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Separate FET packet parser from driver.

This commit is contained in:
Daniel Beer 2012-09-13 15:49:19 +12:00
parent 837e1d8e00
commit 1ac9f30024
4 changed files with 557 additions and 458 deletions
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1
Makefile
View File

@ -123,6 +123,7 @@ OBJ=\
drivers/device.o \
drivers/bsl.o \
drivers/fet.o \
drivers/fet_proto.o \
drivers/fet_error.o \
drivers/fet_db.o \
drivers/flash_bsl.o \

576
drivers/fet.c
View File

@ -1,5 +1,5 @@
/* MSPDebug - debugging tool for the eZ430
* Copyright (C) 2009, 2010 Daniel Beer
* Copyright (C) 2009-2012 Daniel Beer
*
* 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
@ -30,6 +30,7 @@
#include "util.h"
#include "fet.h"
#include "fet_error.h"
#include "fet_proto.h"
#include "fet_db.h"
#include "output.h"
#include "opdb.h"
@ -42,45 +43,19 @@
#include "cdc_acm.h"
#include "obl.h"
/* Send data in separate packets, as in the RF2500 */
#define FET_PROTO_SEPARATE_DATA 0x01
/* Received packets have an extra trailing byte */
#define FET_PROTO_EXTRA_RECV 0x02
/* Command packets have no leading \x7e */
#define FET_PROTO_NOLEAD_SEND 0x04
/* The new identify method should always be used */
#define FET_PROTO_IDENTIFY_NEW 0x08
#define FET_IDENTIFY_NEW 0x08
/* A reset on startup should always be performed */
#define FET_PROTO_FORCE_RESET 0x10
#define MAX_PARAMS 16
#define MAX_BLOCK_SIZE 4096
#define FET_FORCE_RESET 0x10
struct fet_device {
struct device base;
transport_t transport;
int flags;
int version;
int fet_flags;
uint8_t fet_buf[65538];
int fet_len;
/* Recieved packet is parsed into this struct */
struct {
int command_code;
int state;
int argc;
uint32_t argv[MAX_PARAMS];
uint8_t *data;
int datalen;
} fet_reply;
struct fet_proto proto;
};
/**********************************************************************
@ -156,344 +131,6 @@ struct fet_device {
#define FET_POLL_RUNNING 0x01
#define FET_POLL_BREAKPOINT 0x02
/*********************************************************************
* Checksum calculation
*
* This code table is also derived from uif430.
*/
static const uint16_t fcstab[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
static uint16_t calc_checksum(uint8_t *cp, int len)
{
uint16_t fcs = 0xffff;
while (len--) {
fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff];
}
return fcs ^ 0xffff;
}
/*********************************************************************
* FET packet transfer. This level of the interface deals in packets
* send to/from the device.
*/
/* This is a type of data transfer which appears to be unique to
* the RF2500. Blocks of data are sent to an internal buffer. Each
* block is prefixed with a buffer offset and a payload length.
*
* No checksums are included.
*/
static int send_rf2500_data(struct fet_device *dev,
const uint8_t *data, int len)
{
int offset = 0;
while (len) {
uint8_t pbuf[63];
int plen = len > 59 ? 59 : len;
pbuf[0] = 0x83;
pbuf[1] = offset & 0xff;
pbuf[2] = offset >> 8;
pbuf[3] = plen;
memcpy(pbuf + 4, data, plen);
if (dev->transport->ops->send(dev->transport,
pbuf, plen + 4) < 0)
return -1;
data += plen;
len -= plen;
offset += plen;
}
return 0;
}
#define PTYPE_ACK 0
#define PTYPE_CMD 1
#define PTYPE_PARAM 2
#define PTYPE_DATA 3
#define PTYPE_MIXED 4
#define PTYPE_NAK 5
#define PTYPE_FLASH_ACK 6
static int parse_packet(struct fet_device *dev, int plen)
{
uint16_t c = calc_checksum(dev->fet_buf + 2, plen - 2);
uint16_t r = LE_WORD(dev->fet_buf, plen);
int i = 2;
int type;
int error;
if (c != r) {
printc_err("fet: checksum error (calc %04x,"
" recv %04x)\n", c, r);
return -1;
}
if (plen < 6)
goto too_short;
dev->fet_reply.command_code = dev->fet_buf[i++];
type = dev->fet_buf[i++];
dev->fet_reply.state = dev->fet_buf[i++];
error = dev->fet_buf[i++];
if (error) {
printc_err("fet: FET returned error code %d (%s)\n",
error, fet_error(error));
return -1;
}
if (type == PTYPE_NAK) {
printc_err("fet: FET returned NAK\n");
return -1;
}
/* Parse packet parameters */
if (type == PTYPE_PARAM || type == PTYPE_MIXED) {
int j;
if (i + 2 > plen)
goto too_short;
dev->fet_reply.argc = LE_WORD(dev->fet_buf, i);
i += 2;
if (dev->fet_reply.argc >= MAX_PARAMS) {
printc_err("fet: too many params: %d\n",
dev->fet_reply.argc);
return -1;
}
for (j = 0; j < dev->fet_reply.argc; j++) {
if (i + 4 > plen)
goto too_short;
dev->fet_reply.argv[j] = LE_LONG(dev->fet_buf, i);
i += 4;
}
} else {
dev->fet_reply.argc = 0;
}
/* Extract a pointer to the data */
if (type == PTYPE_DATA || type == PTYPE_MIXED) {
if (i + 4 > plen)
goto too_short;
dev->fet_reply.datalen = LE_LONG(dev->fet_buf, i);
i += 4;
if (i + dev->fet_reply.datalen > plen)
goto too_short;
dev->fet_reply.data = dev->fet_buf + i;
} else {
dev->fet_reply.data = NULL;
dev->fet_reply.datalen = 0;
}
return 0;
too_short:
printc_err("fet: too short (%d bytes)\n",
plen);
return -1;
}
/* Receive a packet from the FET. The usual format is:
* <length (2 bytes)> <data> <checksum>
*
* The length is that of the data + checksum. Olimex JTAG adapters follow
* all packets with a trailing 0x7e byte, which must be discarded.
*/
static int recv_packet(struct fet_device *dev)
{
int pkt_extra = (dev->flags & FET_PROTO_EXTRA_RECV) ? 3 : 2;
int plen = LE_WORD(dev->fet_buf, 0);
/* If there's a packet still here from last time, get rid of it */
if (dev->fet_len >= plen + pkt_extra) {
memmove(dev->fet_buf, dev->fet_buf + plen + pkt_extra,
dev->fet_len - plen - pkt_extra);
dev->fet_len -= plen + pkt_extra;
}
/* Keep adding data to the buffer until we have a complete packet */
for (;;) {
int len;
plen = LE_WORD(dev->fet_buf, 0);
if (dev->fet_len >= plen + pkt_extra)
return parse_packet(dev, plen);
len = dev->transport->ops->recv(dev->transport,
dev->fet_buf + dev->fet_len,
sizeof(dev->fet_buf) -
dev->fet_len);
if (len < 0)
return -1;
dev->fet_len += len;
}
return -1;
}
static int send_command(struct fet_device *dev, int command_code,
const uint32_t *params, int nparams,
const uint8_t *extra, int exlen)
{
uint8_t datapkt[MAX_BLOCK_SIZE * 2];
int len = 0;
uint8_t buf[MAX_BLOCK_SIZE * 3];
uint16_t cksum;
int i = 0;
int j;
assert (len + exlen + 2 <= sizeof(datapkt));
/* Command code and packet type */
datapkt[len++] = command_code;
datapkt[len++] = ((nparams > 0) ? 1 : 0) + ((exlen > 0) ? 2 : 0) + 1;
/* Optional parameters */
if (nparams > 0) {
datapkt[len++] = nparams & 0xff;
datapkt[len++] = nparams >> 8;
for (j = 0; j < nparams; j++) {
uint32_t p = params[j];
datapkt[len++] = p & 0xff;
p >>= 8;
datapkt[len++] = p & 0xff;
p >>= 8;
datapkt[len++] = p & 0xff;
p >>= 8;
datapkt[len++] = p & 0xff;
}
}
/* Extra data */
if (extra) {
int x = exlen;
datapkt[len++] = x & 0xff;
x >>= 8;
datapkt[len++] = x & 0xff;
x >>= 8;
datapkt[len++] = x & 0xff;
x >>= 8;
datapkt[len++] = x & 0xff;
memcpy(datapkt + len, extra, exlen);
len += exlen;
}
/* Checksum */
cksum = calc_checksum(datapkt, len);
datapkt[len++] = cksum & 0xff;
datapkt[len++] = cksum >> 8;
/* Copy into buf, escaping special characters and adding
* delimeters.
*/
if (!(dev->flags & FET_PROTO_NOLEAD_SEND))
buf[i++] = 0x7e;
for (j = 0; j < len; j++) {
char c = datapkt[j];
if (c == 0x7e || c == 0x7d) {
buf[i++] = 0x7d;
c ^= 0x20;
}
buf[i++] = c;
}
buf[i++] = 0x7e;
assert (i < sizeof(buf));
return dev->transport->ops->send(dev->transport, buf, i);
}
static int xfer(struct fet_device *dev,
int command_code, const uint8_t *data, int datalen,
int nparams, ...)
{
uint32_t params[MAX_PARAMS];
int i;
va_list ap;
assert (nparams <= MAX_PARAMS);
va_start(ap, nparams);
for (i = 0; i < nparams; i++)
params[i] = va_arg(ap, uint32_t);
va_end(ap);
if (data && (dev->flags & FET_PROTO_SEPARATE_DATA)) {
assert (nparams + 1 <= MAX_PARAMS);
params[nparams++] = datalen;
if (send_rf2500_data(dev, data, datalen) < 0)
return -1;
if (send_command(dev, command_code, params, nparams,
NULL, 0) < 0)
return -1;
} else if (send_command(dev, command_code, params, nparams,
data, datalen) < 0)
return -1;
if (recv_packet(dev) < 0)
return -1;
if (dev->fet_reply.command_code != command_code) {
printc_err("fet: reply type mismatch\n");
return -1;
}
return 0;
}
/**********************************************************************
* MSP430 high-level control functions
*/
@ -508,18 +145,18 @@ static int identify_old(struct fet_device *dev)
{
char idtext[64];
if (xfer(dev, C_IDENTIFY, NULL, 0, 2, 70, 0) < 0)
if (fet_proto_xfer(&dev->proto, C_IDENTIFY, NULL, 0, 2, 70, 0) < 0)
return -1;
if (dev->fet_reply.datalen < 0x26) {
if (dev->proto.datalen < 0x26) {
printc_err("fet: missing info\n");
return -1;
}
memcpy(idtext, dev->fet_reply.data + 4, 32);
memcpy(idtext, dev->proto.data + 4, 32);
idtext[32] = 0;
dev->base.max_breakpoints = LE_WORD(dev->fet_reply.data, 0x2a);
dev->base.max_breakpoints = LE_WORD(dev->proto.data, 0x2a);
show_dev_info(idtext, dev);
@ -530,29 +167,29 @@ static int identify_new(struct fet_device *dev, const char *force_id)
{
const struct fet_db_record *r;
if (xfer(dev, C_IDENT1, NULL, 0, 2, 0, 0) < 0) {
if (fet_proto_xfer(&dev->proto, C_IDENT1, NULL, 0, 2, 0, 0) < 0) {
printc_err("fet: command C_IDENT1 failed\n");
return -1;
}
if (dev->fet_reply.datalen < 2) {
if (dev->proto.datalen < 2) {
printc_err("fet: missing info\n");
return -1;
}
printc_dbg("Device ID: 0x%02x%02x\n",
dev->fet_reply.data[0], dev->fet_reply.data[1]);
dev->proto.data[0], dev->proto.data[1]);
if (force_id)
r = fet_db_find_by_name(force_id);
else
r = fet_db_find_by_msg28(dev->fet_reply.data,
dev->fet_reply.datalen);
r = fet_db_find_by_msg28(dev->proto.data,
dev->proto.datalen);
if (!r) {
printc_err("fet: unknown device\n");
debug_hexdump("msg28_data:", dev->fet_reply.data,
dev->fet_reply.datalen);
debug_hexdump("msg28_data:", dev->proto.data,
dev->proto.datalen);
return -1;
}
@ -590,12 +227,14 @@ static int identify_new(struct fet_device *dev, const char *force_id)
show_dev_info(r->name, dev);
if (xfer(dev, C_IDENT3, r->msg2b_data, r->msg2b_len, 0) < 0)
if (fet_proto_xfer(&dev->proto, C_IDENT3,
r->msg2b_data, r->msg2b_len, 0) < 0)
printc_err("fet: warning: message C_IDENT3 failed\n");
if (xfer(dev, C_IDENT2, r->msg29_data, FET_DB_MSG29_LEN,
3, r->msg29_params[0], r->msg29_params[1],
r->msg29_params[2]) < 0) {
if (fet_proto_xfer(&dev->proto, C_IDENT2,
r->msg29_data, FET_DB_MSG29_LEN,
3, r->msg29_params[0], r->msg29_params[1],
r->msg29_params[2]) < 0) {
printc_err("fet: message C_IDENT2 failed\n");
return -1;
}
@ -605,7 +244,7 @@ static int identify_new(struct fet_device *dev, const char *force_id)
static int do_identify(struct fet_device *dev, const char *force_id)
{
if (dev->flags & FET_PROTO_IDENTIFY_NEW)
if (dev->fet_flags & FET_IDENTIFY_NEW)
return identify_new(dev, force_id);
if (dev->version < 20300000)
@ -616,7 +255,7 @@ static int do_identify(struct fet_device *dev, const char *force_id)
static int do_run(struct fet_device *dev, int type)
{
if (xfer(dev, C_RUN, NULL, 0, 2, type, 0) < 0) {
if (fet_proto_xfer(&dev->proto, C_RUN, NULL, 0, 2, type, 0) < 0) {
printc_err("fet: failed to restart CPU\n");
return -1;
}
@ -630,12 +269,16 @@ static int fet_erase(device_t dev_base, device_erase_type_t type,
struct fet_device *dev = (struct fet_device *)dev_base;
int fet_erase_type = FET_ERASE_MAIN;
if (xfer(dev, C_CONFIGURE, NULL, 0, 2, FET_CONFIG_CLKCTRL, 0x26) < 0) {
if (fet_proto_xfer(&dev->proto,
C_CONFIGURE, NULL, 0,
2, FET_CONFIG_CLKCTRL, 0x26) < 0) {
printc_err("fet: config (1) failed\n");
return -1;
}
if (xfer(dev, C_CONFIGURE, NULL, 0, 2, FET_CONFIG_FLASH_LOCK, 0) < 0) {
if (fet_proto_xfer(&dev->proto,
C_CONFIGURE, NULL, 0,
2, FET_CONFIG_FLASH_LOCK, 0) < 0) {
printc_err("fet: config (2) failed\n");
return -1;
}
@ -660,7 +303,8 @@ static int fet_erase(device_t dev_base, device_erase_type_t type,
return -1;
}
if (xfer(dev, C_ERASE, NULL, 0, 3, fet_erase_type, addr, 0) < 0) {
if (fet_proto_xfer(&dev->proto, C_ERASE, NULL, 0,
3, fet_erase_type, addr, 0) < 0) {
printc_err("fet: erase command failed\n");
return -1;
}
@ -676,12 +320,12 @@ static device_status_t fet_poll(device_t dev_base)
if ((delay_ms(50) < 0) || ctrlc_check())
return DEVICE_STATUS_INTR;
if (xfer(dev, C_STATE, NULL, 0, 1, 0) < 0) {
if (fet_proto_xfer(&dev->proto, C_STATE, NULL, 0, 1, 0) < 0) {
printc_err("fet: polling failed\n");
return DEVICE_STATUS_ERROR;
}
if (!(dev->fet_reply.argv[0] & FET_POLL_RUNNING))
if (!(dev->proto.argv[0] & FET_POLL_RUNNING))
return DEVICE_STATUS_HALTED;
return DEVICE_STATUS_RUNNING;
@ -702,8 +346,8 @@ static int refresh_bps(struct fet_device *dev)
if (!(bp->flags & DEVICE_BP_ENABLED))
addr = 0;
if (xfer(dev, C_BREAKPOINT, NULL, 0,
2, i, addr) < 0) {
if (fet_proto_xfer(&dev->proto, C_BREAKPOINT, NULL, 0,
2, i, addr) < 0) {
printc_err("fet: failed to refresh "
"breakpoint #%d\n", i);
ret = -1;
@ -722,7 +366,8 @@ static int fet_ctl(device_t dev_base, device_ctl_t action)
switch (action) {
case DEVICE_CTL_RESET:
if (xfer(dev, C_RESET, NULL, 0, 3, FET_RESET_ALL, 0, 0) < 0) {
if (fet_proto_xfer(&dev->proto, C_RESET, NULL, 0,
3, FET_RESET_ALL, 0, 0) < 0) {
printc_err("fet: reset failed\n");
return -1;
}
@ -735,7 +380,7 @@ static int fet_ctl(device_t dev_base, device_ctl_t action)
return do_run(dev, FET_RUN_BREAKPOINT);
case DEVICE_CTL_HALT:
if (xfer(dev, C_STATE, NULL, 0, 1, 1) < 0) {
if (fet_proto_xfer(&dev->proto, C_STATE, NULL, 0, 1, 1) < 0) {
printc_err("fet: failed to halt CPU\n");
return -1;
}
@ -772,14 +417,14 @@ static void fet_destroy(device_t dev_base)
* FR5739, or else the value of the reset vector gets set to
* 0xffff at the start of the next JTAG session.
*/
if (xfer(dev, C_RESET, NULL, 0, 3, FET_RESET_ALL, 1,
!device_is_fram(dev_base)) < 0)
if (fet_proto_xfer(&dev->proto, C_RESET, NULL, 0, 3, FET_RESET_ALL, 1,
!device_is_fram(dev_base)) < 0)
printc_err("fet: final reset failed\n");
if (xfer(dev, C_CLOSE, NULL, 0, 1, 0) < 0)
if (fet_proto_xfer(&dev->proto, C_CLOSE, NULL, 0, 1, 0) < 0)
printc_err("fet: close command failed\n");
dev->transport->ops->destroy(dev->transport);
dev->proto.transport->ops->destroy(dev->proto.transport);
free(dev);
}
@ -787,12 +432,13 @@ static int read_byte(struct fet_device *dev, address_t addr, uint8_t *out)
{
address_t base = addr & ~1;
if (xfer(dev, C_READMEMORY, NULL, 0, 2, base, 2) < 0) {
if (fet_proto_xfer(&dev->proto, C_READMEMORY, NULL, 0,
2, base, 2) < 0) {
printc_err("fet: failed to read byte from 0x%04x\n", addr);
return -1;
}
*out = dev->fet_reply.data[addr & 1];
*out = dev->proto.data[addr & 1];
return 0;
}
@ -801,16 +447,16 @@ static int write_byte(struct fet_device *dev, address_t addr, uint8_t value)
uint8_t buf[2];
address_t base = addr & ~1;
if (xfer(dev, C_READMEMORY, NULL, 0, 2, base, 2) < 0) {
if (fet_proto_xfer(&dev->proto, C_READMEMORY, NULL, 0, 2, base, 2) < 0) {
printc_err("fet: failed to read byte from 0x%04x\n", addr);
return -1;
}
buf[0] = dev->fet_reply.data[0];
buf[1] = dev->fet_reply.data[1];
buf[0] = dev->proto.data[0];
buf[1] = dev->proto.data[1];
buf[addr & 1] = value;
if (xfer(dev, C_WRITEMEMORY, buf, 2, 1, base) < 0) {
if (fet_proto_xfer(&dev->proto, C_WRITEMEMORY, buf, 2, 1, base) < 0) {
printc_err("fet: failed to write byte from 0x%04x\n", addr);
return -1;
}
@ -824,8 +470,8 @@ static int get_adjusted_block_size(void)
if (block_size < 2)
block_size = 2;
if (block_size > MAX_BLOCK_SIZE)
block_size = MAX_BLOCK_SIZE;
if (block_size > FET_PROTO_MAX_BLOCK)
block_size = FET_PROTO_MAX_BLOCK;
return block_size;
}
@ -849,19 +495,20 @@ int fet_readmem(device_t dev_base, address_t addr, uint8_t *buffer,
plen &= ~0x1;
if (xfer(dev, C_READMEMORY, NULL, 0, 2, addr, plen) < 0) {
if (fet_proto_xfer(&dev->proto, C_READMEMORY, NULL, 0,
2, addr, plen) < 0) {
printc_err("fet: failed to read "
"from 0x%04x\n", addr);
return -1;
}
if (dev->fet_reply.datalen < plen) {
if (dev->proto.datalen < plen) {
printc_err("fet: short data: "
"%d bytes\n", dev->fet_reply.datalen);
"%d bytes\n", dev->proto.datalen);
return -1;
}
memcpy(buffer, dev->fet_reply.data, plen);
memcpy(buffer, dev->proto.data, plen);
buffer += plen;
count -= plen;
addr += plen;
@ -893,7 +540,8 @@ int fet_writemem(device_t dev_base, address_t addr,
plen &= ~0x1;
ret = xfer(dev, C_WRITEMEMORY, buffer, plen, 1, addr);
ret = fet_proto_xfer(&dev->proto,
C_WRITEMEMORY, buffer, plen, 1, addr);
if (ret < 0) {
printc_err("fet: failed to write to 0x%04x\n",
@ -917,17 +565,17 @@ static int fet_getregs(device_t dev_base, address_t *regs)
struct fet_device *dev = (struct fet_device *)dev_base;
int i;
if (xfer(dev, C_READREGISTERS, NULL, 0, 0) < 0)
if (fet_proto_xfer(&dev->proto, C_READREGISTERS, NULL, 0, 0) < 0)
return -1;
if (dev->fet_reply.datalen < DEVICE_NUM_REGS * 4) {
if (dev->proto.datalen < DEVICE_NUM_REGS * 4) {
printc_err("fet: short reply (%d bytes)\n",
dev->fet_reply.datalen);
dev->proto.datalen);
return -1;
}
for (i = 0; i < DEVICE_NUM_REGS; i++)
regs[i] = LE_LONG(dev->fet_reply.data, i * 4);
regs[i] = LE_LONG(dev->proto.data, i * 4);
return 0;
}
@ -948,7 +596,8 @@ static int fet_setregs(device_t dev_base, const address_t *regs)
buf[i * 4 + 3] = regs[i] >> 24;
}
ret = xfer(dev, C_WRITEREGISTERS, buf, sizeof(buf), 1, 0xffff);
ret = fet_proto_xfer(&dev->proto, C_WRITEREGISTERS,
buf, sizeof(buf), 1, 0xffff);
if (ret < 0) {
printc_err("fet: context set failed\n");
@ -959,11 +608,11 @@ static int fet_setregs(device_t dev_base, const address_t *regs)
}
static int do_configure(struct fet_device *dev,
const struct device_args *args)
const struct device_args *args)
{
if (!(args->flags & DEVICE_FLAG_JTAG)) {
if (!xfer(dev, C_CONFIGURE, NULL, 0,
2, FET_CONFIG_PROTOCOL, 1)) {
if (!fet_proto_xfer(&dev->proto, C_CONFIGURE, NULL, 0,
2, FET_CONFIG_PROTOCOL, 1)) {
printc_dbg("Configured for Spy-Bi-Wire\n");
return 0;
}
@ -972,8 +621,8 @@ static int do_configure(struct fet_device *dev,
return -1;
}
if (!xfer(dev, C_CONFIGURE, NULL, 0,
2, FET_CONFIG_PROTOCOL, 2)) {
if (!fet_proto_xfer(&dev->proto, C_CONFIGURE, NULL, 0,
2, FET_CONFIG_PROTOCOL, 2)) {
printc_dbg("Configured for JTAG (2)\n");
return 0;
}
@ -981,8 +630,8 @@ static int do_configure(struct fet_device *dev,
printc_err("fet: warning: JTAG configuration failed -- "
"retrying\n");
if (!xfer(dev, C_CONFIGURE, NULL, 0,
2, FET_CONFIG_PROTOCOL, 0)) {
if (!fet_proto_xfer(&dev->proto, C_CONFIGURE, NULL, 0,
2, FET_CONFIG_PROTOCOL, 0)) {
printc_dbg("Configured for JTAG (0)\n");
return 0;
}
@ -994,28 +643,26 @@ static int do_configure(struct fet_device *dev,
int try_open(struct fet_device *dev, const struct device_args *args,
int send_reset)
{
transport_t transport = dev->transport;
transport_t transport = dev->proto.transport;
if (dev->flags & FET_PROTO_NOLEAD_SEND) {
if (dev->proto.proto_flags & FET_PROTO_NOLEAD_SEND) {
printc("Resetting Olimex command processor...\n");
transport->ops->send(dev->transport,
(const uint8_t *)"\x7e", 1);
transport->ops->send(transport, (const uint8_t *)"\x7e", 1);
delay_ms(5);
transport->ops->send(dev->transport,
(const uint8_t *)"\x7e", 1);
transport->ops->send(transport, (const uint8_t *)"\x7e", 1);
delay_ms(5);
}
printc_dbg("Initializing FET...\n");
if (xfer(dev, C_INITIALIZE, NULL, 0, 0) < 0) {
if (fet_proto_xfer(&dev->proto, C_INITIALIZE, NULL, 0, 0) < 0) {
printc_err("fet: open failed\n");
return -1;
}
dev->version = dev->fet_reply.argv[0];
dev->version = dev->proto.argv[0];
printc_dbg("FET protocol version is %d\n", dev->version);
if (xfer(dev, 0x27, NULL, 0, 1, 4) < 0) {
if (fet_proto_xfer(&dev->proto, 0x27, NULL, 0, 1, 4) < 0) {
printc_err("fet: init failed\n");
return -1;
}
@ -1025,12 +672,14 @@ int try_open(struct fet_device *dev, const struct device_args *args,
if (send_reset || args->flags & DEVICE_FLAG_FORCE_RESET) {
printc_dbg("Sending reset...\n");
if (xfer(dev, C_RESET, NULL, 0, 3, FET_RESET_ALL, 0, 0) < 0)
if (fet_proto_xfer(&dev->proto, C_RESET, NULL, 0,
3, FET_RESET_ALL, 0, 0) < 0)
printc_err("warning: fet: reset failed\n");
}
/* set VCC */
if (xfer(dev, C_VCC, NULL, 0, 1, args->vcc_mv) < 0)
if (fet_proto_xfer(&dev->proto, C_VCC, NULL, 0,
1, args->vcc_mv) < 0)
printc_err("warning: fet: set VCC failed\n");
else
printc_dbg("Set Vcc: %d mV\n", args->vcc_mv);
@ -1045,8 +694,9 @@ int try_open(struct fet_device *dev, const struct device_args *args,
}
static device_t fet_open(const struct device_args *args,
int flags, transport_t transport,
const struct device_class *type)
int proto_flags, transport_t transport,
int fet_flags,
const struct device_class *type)
{
struct fet_device *dev = malloc(sizeof(*dev));
int i;
@ -1058,11 +708,12 @@ static device_t fet_open(const struct device_args *args,
memset(dev, 0, sizeof(*dev));
dev->base.type = type;
dev->transport = transport;
dev->flags = flags;
fet_proto_init(&dev->proto, transport, proto_flags);
if (try_open(dev, args, flags & FET_PROTO_FORCE_RESET) < 0) {
dev->base.type = type;
dev->fet_flags = fet_flags;
if (try_open(dev, args, fet_flags & FET_FORCE_RESET) < 0) {
delay_ms(500);
printc("Trying again...\n");
if (try_open(dev, args, 1) < 0)
@ -1092,11 +743,12 @@ static device_t fet_open_rf2500(const struct device_args *args)
return NULL;
}
trans = rf2500_open(args->path, args->requested_serial);
if (!trans)
return NULL;
trans = rf2500_open(args->path, args->requested_serial);
if (!trans)
return NULL;
return fet_open(args, FET_PROTO_SEPARATE_DATA, trans, &device_rf2500);
return fet_open(args, FET_PROTO_SEPARATE_DATA, trans,
0, &device_rf2500);
}
const struct device_class device_rf2500 = {
@ -1156,9 +808,11 @@ static device_t fet_open_olimex_iso_mk2(const struct device_args *args)
if (!obl_get_version(trans, &version))
printc_dbg("Olimex firmware version: %x\n", version);
return fet_open(args, FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV |
FET_PROTO_IDENTIFY_NEW | FET_PROTO_FORCE_RESET,
trans, &device_olimex_iso_mk2);
return fet_open(args,
FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV,
trans,
FET_FORCE_RESET | FET_IDENTIFY_NEW,
&device_olimex_iso_mk2);
}
const struct device_class device_olimex_iso_mk2 = {
@ -1189,9 +843,11 @@ static device_t fet_open_olimex(const struct device_args *args)
if (!trans)
return NULL;
return fet_open(args, FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV |
FET_PROTO_IDENTIFY_NEW | FET_PROTO_FORCE_RESET,
trans, &device_olimex);
return fet_open(args,
FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV,
trans,
FET_IDENTIFY_NEW | FET_FORCE_RESET,
&device_olimex);
}
const struct device_class device_olimex = {
@ -1222,9 +878,11 @@ static device_t fet_open_olimex_v1(const struct device_args *args)
if (!trans)
return NULL;
return fet_open(args, FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV |
FET_PROTO_IDENTIFY_NEW,
trans, &device_olimex_v1);
return fet_open(args,
FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV,
trans,
FET_IDENTIFY_NEW,
&device_olimex_v1);
}
const struct device_class device_olimex_v1 = {
@ -1255,9 +913,11 @@ static device_t fet_open_olimex_iso(const struct device_args *args)
if (!trans)
return NULL;
return fet_open(args, FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV |
FET_PROTO_IDENTIFY_NEW,
trans, &device_olimex_iso);
return fet_open(args,
FET_PROTO_NOLEAD_SEND | FET_PROTO_EXTRA_RECV,
trans,
FET_IDENTIFY_NEW,
&device_olimex_iso);
}
const struct device_class device_olimex_iso = {
@ -1287,7 +947,7 @@ static device_t fet_open_uif(const struct device_args *args)
if (!trans)
return NULL;
return fet_open(args, 0, trans, &device_uif);
return fet_open(args, 0, trans, 0, &device_uif);
}
const struct device_class device_uif = {

371
drivers/fet_proto.c Normal file
View File

@ -0,0 +1,371 @@
/* MSPDebug - debugging tool for the eZ430
* Copyright (C) 2009-2012 Daniel Beer
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdarg.h>
#include <assert.h>
#include <string.h>
#include "util.h"
#include "fet_proto.h"
#include "fet_error.h"
#include "output.h"
/*********************************************************************
* Checksum calculation
*
* This code table is also derived from uif430.
*/
static const uint16_t fcstab[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
static uint16_t calc_checksum(uint8_t *cp, int len)
{
uint16_t fcs = 0xffff;
while (len--) {
fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff];
}
return fcs ^ 0xffff;
}
/*********************************************************************
* FET packet transfer. This level of the interface deals in packets
* send to/from the device.
*/
/* This is a type of data transfer which appears to be unique to
* the RF2500. Blocks of data are sent to an internal buffer. Each
* block is prefixed with a buffer offset and a payload length.
*
* No checksums are included.
*/
static int send_rf2500_data(struct fet_proto *dev,
const uint8_t *data, int len)
{
int offset = 0;
while (len) {
uint8_t pbuf[63];
int plen = len > 59 ? 59 : len;
pbuf[0] = 0x83;
pbuf[1] = offset & 0xff;
pbuf[2] = offset >> 8;
pbuf[3] = plen;
memcpy(pbuf + 4, data, plen);
if (dev->transport->ops->send(dev->transport,
pbuf, plen + 4) < 0)
return -1;
data += plen;
len -= plen;
offset += plen;
}
return 0;
}
#define PTYPE_ACK 0
#define PTYPE_CMD 1
#define PTYPE_PARAM 2
#define PTYPE_DATA 3
#define PTYPE_MIXED 4
#define PTYPE_NAK 5
#define PTYPE_FLASH_ACK 6
static int parse_packet(struct fet_proto *dev, int plen)
{
uint16_t c = calc_checksum(dev->fet_buf + 2, plen - 2);
uint16_t r = LE_WORD(dev->fet_buf, plen);
int i = 2;
int type;
int error;
if (c != r) {
printc_err("fet: checksum error (calc %04x,"
" recv %04x)\n", c, r);
return -1;
}
if (plen < 6)
goto too_short;
dev->command_code = dev->fet_buf[i++];
type = dev->fet_buf[i++];
dev->state = dev->fet_buf[i++];
error = dev->fet_buf[i++];
if (error) {
printc_err("fet: FET returned error code %d (%s)\n",
error, fet_error(error));
return -1;
}
if (type == PTYPE_NAK) {
printc_err("fet: FET returned NAK\n");
return -1;
}
/* Parse packet parameters */
if (type == PTYPE_PARAM || type == PTYPE_MIXED) {
int j;
if (i + 2 > plen)
goto too_short;
dev->argc = LE_WORD(dev->fet_buf, i);
i += 2;
if (dev->argc >= FET_PROTO_MAX_PARAMS) {
printc_err("fet: too many params: %d\n", dev->argc);
return -1;
}
for (j = 0; j < dev->argc; j++) {
if (i + 4 > plen)
goto too_short;
dev->argv[j] = LE_LONG(dev->fet_buf, i);
i += 4;
}
} else {
dev->argc = 0;
}
/* Extract a pointer to the data */
if (type == PTYPE_DATA || type == PTYPE_MIXED) {
if (i + 4 > plen)
goto too_short;
dev->datalen = LE_LONG(dev->fet_buf, i);
i += 4;
if (i + dev->datalen > plen)
goto too_short;
dev->data = dev->fet_buf + i;
} else {
dev->data = NULL;
dev->datalen = 0;
}
return 0;
too_short:
printc_err("fet: too short (%d bytes)\n",
plen);
return -1;
}
/* Receive a packet from the FET. The usual format is:
* <length (2 bytes)> <data> <checksum>
*
* The length is that of the data + checksum. Olimex JTAG adapters follow
* all packets with a trailing 0x7e byte, which must be discarded.
*/
static int recv_packet(struct fet_proto *dev)
{
int pkt_extra = (dev->proto_flags & FET_PROTO_EXTRA_RECV) ? 3 : 2;
int plen = LE_WORD(dev->fet_buf, 0);
/* If there's a packet still here from last time, get rid of it */
if (dev->fet_len >= plen + pkt_extra) {
memmove(dev->fet_buf, dev->fet_buf + plen + pkt_extra,
dev->fet_len - plen - pkt_extra);
dev->fet_len -= plen + pkt_extra;
}
/* Keep adding data to the buffer until we have a complete packet */
for (;;) {
int len;
plen = LE_WORD(dev->fet_buf, 0);
if (dev->fet_len >= plen + pkt_extra)
return parse_packet(dev, plen);
len = dev->transport->ops->recv(dev->transport,
dev->fet_buf + dev->fet_len,
sizeof(dev->fet_buf) -
dev->fet_len);
if (len < 0)
return -1;
dev->fet_len += len;
}
return -1;
}
static int send_command(struct fet_proto *dev, int command_code,
const uint32_t *params, int nparams,
const uint8_t *extra, int exlen)
{
uint8_t datapkt[FET_PROTO_MAX_BLOCK * 2];
int len = 0;
uint8_t buf[FET_PROTO_MAX_BLOCK * 3];
uint16_t cksum;
int i = 0;
int j;
assert (len + exlen + 2 <= sizeof(datapkt));
/* Command code and packet type */
datapkt[len++] = command_code;
datapkt[len++] = ((nparams > 0) ? 1 : 0) + ((exlen > 0) ? 2 : 0) + 1;
/* Optional parameters */
if (nparams > 0) {
datapkt[len++] = nparams & 0xff;
datapkt[len++] = nparams >> 8;
for (j = 0; j < nparams; j++) {
uint32_t p = params[j];
datapkt[len++] = p & 0xff;
p >>= 8;
datapkt[len++] = p & 0xff;
p >>= 8;
datapkt[len++] = p & 0xff;
p >>= 8;
datapkt[len++] = p & 0xff;
}
}
/* Extra data */
if (extra) {
int x = exlen;
datapkt[len++] = x & 0xff;
x >>= 8;
datapkt[len++] = x & 0xff;
x >>= 8;
datapkt[len++] = x & 0xff;
x >>= 8;
datapkt[len++] = x & 0xff;
memcpy(datapkt + len, extra, exlen);
len += exlen;
}
/* Checksum */
cksum = calc_checksum(datapkt, len);
datapkt[len++] = cksum & 0xff;
datapkt[len++] = cksum >> 8;
/* Copy into buf, escaping special characters and adding
* delimeters.
*/
if (!(dev->proto_flags & FET_PROTO_NOLEAD_SEND))
buf[i++] = 0x7e;
for (j = 0; j < len; j++) {
char c = datapkt[j];
if (c == 0x7e || c == 0x7d) {
buf[i++] = 0x7d;
c ^= 0x20;
}
buf[i++] = c;
}
buf[i++] = 0x7e;
assert (i < sizeof(buf));
return dev->transport->ops->send(dev->transport, buf, i);
}
void fet_proto_init(struct fet_proto *dev, transport_t transport,
int proto_flags)
{
dev->transport = transport;
dev->proto_flags = proto_flags;
dev->fet_len = 0;
}
int fet_proto_xfer(struct fet_proto *dev,
int command_code, const uint8_t *data, int datalen,
int nparams, ...)
{
uint32_t params[FET_PROTO_MAX_PARAMS];
int i;
va_list ap;
assert (nparams <= FET_PROTO_MAX_PARAMS);
va_start(ap, nparams);
for (i = 0; i < nparams; i++)
params[i] = va_arg(ap, uint32_t);
va_end(ap);
if (data && (dev->proto_flags & FET_PROTO_SEPARATE_DATA)) {
assert (nparams + 1 <= FET_PROTO_MAX_PARAMS);
params[nparams++] = datalen;
if (send_rf2500_data(dev, data, datalen) < 0)
return -1;
if (send_command(dev, command_code, params, nparams,
NULL, 0) < 0)
return -1;
} else if (send_command(dev, command_code, params, nparams,
data, datalen) < 0)
return -1;
if (recv_packet(dev) < 0)
return -1;
if (dev->command_code != command_code) {
printc_err("fet: reply type mismatch\n");
return -1;
}
return 0;
}

67
drivers/fet_proto.h Normal file
View File

@ -0,0 +1,67 @@
/* MSPDebug - debugging tool for the eZ430
* Copyright (C) 2009-2012 Daniel Beer
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef FET_PROTO_H_
#define FET_PROTO_H_
#include <stdint.h>
#include "transport.h"
/* Send data in separate packets, as in the RF2500 */
#define FET_PROTO_SEPARATE_DATA 0x01
/* Received packets have an extra trailing byte */
#define FET_PROTO_EXTRA_RECV 0x02
/* Command packets have no leading \x7e */
#define FET_PROTO_NOLEAD_SEND 0x04
/* Data transfer limits */
#define FET_PROTO_MAX_PARAMS 16
#define FET_PROTO_MAX_BLOCK 4096
/* Protocol parser structure */
struct fet_proto {
transport_t transport;
int proto_flags;
/* Raw packet buffer */
uint8_t fet_buf[65538];
int fet_len;
/* Received packet is parsed into these fields */
int command_code;
int state;
int argc;
uint32_t argv[FET_PROTO_MAX_PARAMS];
uint8_t *data;
int datalen;
};
/* Initialize a FET protocol parser */
void fet_proto_init(struct fet_proto *p, transport_t trans, int proto_flags);
/* Perform a command-response transfer */
int fet_proto_xfer(struct fet_proto *p,
int command_code, const uint8_t *data, int datalen,
int nparams, ...);
#endif