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scripts: add kwboot tool

This tool is used with Marvell EBU SoC to trigger the UART boot mode
provided by the SoC BootROM, and push the bootloader image to the
target using the Xmodem protocol.

It has been taken from the U-Boot source code, with minor
modifications to make it work with Armada 370/XP platforms.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Thomas Petazzoni 2013-05-09 11:52:46 +02:00 committed by Sascha Hauer
parent a2a728c416
commit 0535713bbf
3 changed files with 719 additions and 1 deletions

1
scripts/.gitignore vendored
View File

@ -3,6 +3,7 @@ bin2c
gen_netx_image
kallsyms
kwbimage
kwboot
mk-am35xx-spi-image
mkimage
mkublheader

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@ -8,7 +8,7 @@ hostprogs-$(CONFIG_KALLSYMS) += kallsyms
hostprogs-y += bin2c
hostprogs-y += mkimage
hostprogs-y += bareboxenv
hostprogs-$(CONFIG_ARCH_MVEBU) += kwbimage
hostprogs-$(CONFIG_ARCH_MVEBU) += kwbimage kwboot
hostprogs-$(CONFIG_ARCH_NETX) += gen_netx_image
hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP mk-am35xx-spi-image
hostprogs-$(CONFIG_ARCH_S5PCxx) += s5p_cksum

717
scripts/kwboot.c Normal file
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@ -0,0 +1,717 @@
/*
* Boot a Marvell Kirkwood SoC, with Xmodem over UART0.
*
* (c) 2012 Daniel Stodden <daniel.stodden@gmail.com>
*
* References: marvell.com, "88F6180, 88F6190, 88F6192, and 88F6281
* Integrated Controller: Functional Specifications" December 2,
* 2008. Chapter 24.2 "BootROM Firmware".
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <libgen.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <termios.h>
#include <sys/mman.h>
#include <sys/stat.h>
/*
* Marvell BootROM UART Sensing
*/
static unsigned char kwboot_msg_boot[] = {
0xBB, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77
};
static unsigned char kwboot_msg_debug[] = {
0xDD, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77
};
#define KWBOOT_MSG_REQ_DELAY 1000 /* ms */
#define KWBOOT_MSG_RSP_TIMEO 1000 /* ms */
/*
* Xmodem Transfers
*/
#define SOH 1 /* sender start of block header */
#define EOT 4 /* sender end of block transfer */
#define ACK 6 /* target block ack */
#define NAK 21 /* target block negative ack */
#define CAN 24 /* target/sender transfer cancellation */
struct kwboot_block {
uint8_t soh;
uint8_t pnum;
uint8_t _pnum;
uint8_t data[128];
uint8_t csum;
} __attribute((packed));
#define KWBOOT_BLK_RSP_TIMEO 1000 /* ms */
static int kwboot_verbose;
static void
kwboot_printv(const char *fmt, ...)
{
va_list ap;
if (kwboot_verbose) {
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
fflush(stdout);
}
}
static void
__spinner(void)
{
const char seq[] = { '-', '\\', '|', '/' };
const int div = 8;
static int state, bs;
if (state % div == 0) {
fputc(bs, stdout);
fputc(seq[state / div % sizeof(seq)], stdout);
fflush(stdout);
}
bs = '\b';
state++;
}
static void
kwboot_spinner(void)
{
if (kwboot_verbose)
__spinner();
}
static void
__progress(int pct, char c)
{
const int width = 70;
static const char *nl = "";
static int pos;
if (pos % width == 0)
printf("%s%3d %% [", nl, pct);
fputc(c, stdout);
nl = "]\n";
pos++;
if (pct == 100) {
while (pos++ < width)
fputc(' ', stdout);
fputs(nl, stdout);
}
fflush(stdout);
}
static void
kwboot_progress(int _pct, char c)
{
static int pct;
if (_pct != -1)
pct = _pct;
if (kwboot_verbose)
__progress(pct, c);
}
static int
kwboot_tty_recv(int fd, void *buf, size_t len, int timeo)
{
int rc, nfds;
fd_set rfds;
struct timeval tv;
ssize_t n;
rc = -1;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
tv.tv_sec = 0;
tv.tv_usec = timeo * 1000;
if (tv.tv_usec > 1000000) {
tv.tv_sec += tv.tv_usec / 1000000;
tv.tv_usec %= 1000000;
}
do {
nfds = select(fd + 1, &rfds, NULL, NULL, &tv);
if (nfds < 0)
goto out;
if (!nfds) {
errno = ETIMEDOUT;
goto out;
}
n = read(fd, buf, len);
if (n < 0)
goto out;
buf = (char *)buf + n;
len -= n;
} while (len > 0);
rc = 0;
out:
return rc;
}
static int
kwboot_tty_send(int fd, const void *buf, size_t len)
{
int rc;
ssize_t n;
rc = -1;
do {
n = write(fd, buf, len);
if (n < 0)
goto out;
buf = (char *)buf + n;
len -= n;
} while (len > 0);
rc = tcdrain(fd);
out:
return rc;
}
static int
kwboot_tty_send_char(int fd, unsigned char c)
{
return kwboot_tty_send(fd, &c, 1);
}
static speed_t
kwboot_tty_speed(int baudrate)
{
switch (baudrate) {
case 115200:
return B115200;
case 57600:
return B57600;
case 38400:
return B38400;
case 19200:
return B19200;
case 9600:
return B9600;
}
return -1;
}
static int
kwboot_open_tty(const char *path, speed_t speed)
{
int rc, fd;
struct termios tio;
rc = -1;
fd = open(path, O_RDWR|O_NOCTTY|O_NDELAY);
if (fd < 0)
goto out;
memset(&tio, 0, sizeof(tio));
tio.c_iflag = 0;
tio.c_cflag = CREAD|CLOCAL|CS8;
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 10;
cfsetospeed(&tio, speed);
cfsetispeed(&tio, speed);
rc = tcsetattr(fd, TCSANOW, &tio);
if (rc)
goto out;
rc = fd;
out:
if (rc < 0) {
if (fd >= 0)
close(fd);
}
return rc;
}
static int
kwboot_bootmsg(int tty, void *msg)
{
int rc;
char c;
kwboot_printv("Sending boot message. Please reboot the target...");
do {
rc = tcflush(tty, TCIOFLUSH);
if (rc)
break;
rc = kwboot_tty_send(tty, msg, 8);
if (rc) {
usleep(KWBOOT_MSG_REQ_DELAY * 1000);
continue;
}
rc = kwboot_tty_recv(tty, &c, 1, KWBOOT_MSG_RSP_TIMEO);
kwboot_spinner();
} while (rc || c != NAK);
kwboot_printv("\n");
return rc;
}
static int
kwboot_debugmsg(int tty, void *msg)
{
int rc;
kwboot_printv("Sending debug message. Please reboot the target...");
do {
char buf[16];
rc = tcflush(tty, TCIOFLUSH);
if (rc)
break;
rc = kwboot_tty_send(tty, msg, 8);
if (rc) {
usleep(KWBOOT_MSG_REQ_DELAY * 1000);
continue;
}
rc = kwboot_tty_recv(tty, buf, 16, KWBOOT_MSG_RSP_TIMEO);
kwboot_spinner();
} while (rc);
kwboot_printv("\n");
return rc;
}
static int
kwboot_xm_makeblock(struct kwboot_block *block, const void *data,
size_t size, int pnum)
{
const size_t blksz = sizeof(block->data);
size_t n;
int i;
block->pnum = pnum;
block->_pnum = ~block->pnum;
n = size < blksz ? size : blksz;
memcpy(&block->data[0], data, n);
memset(&block->data[n], 0, blksz - n);
block->csum = 0;
for (i = 0; i < n; i++)
block->csum += block->data[i];
return n;
}
static int
kwboot_xm_sendblock(int fd, struct kwboot_block *block)
{
int rc, retries;
char c;
retries = 16;
do {
rc = kwboot_tty_send(fd, block, sizeof(*block));
if (rc)
break;
do {
rc = kwboot_tty_recv(fd, &c, 1, KWBOOT_BLK_RSP_TIMEO);
if (rc)
break;
if (c != ACK && c!= NAK && c != CAN)
printf("%c", c);
} while (c != ACK && c != NAK && c != CAN);
if (c != ACK)
kwboot_progress(-1, '+');
} while (c == NAK && retries-- > 0);
rc = -1;
switch (c) {
case ACK:
rc = 0;
break;
case NAK:
errno = EBADMSG;
break;
case CAN:
errno = ECANCELED;
break;
default:
errno = EPROTO;
break;
}
return rc;
}
static int
kwboot_xmodem(int tty, const void *_data, size_t size)
{
const uint8_t *data = _data;
int rc, pnum, N, err;
pnum = 1;
N = 0;
kwboot_printv("Sending boot image...\n");
do {
struct kwboot_block block;
int n;
n = kwboot_xm_makeblock(&block,
data + N, size - N,
pnum++);
if (n < 0)
goto can;
if (!n)
break;
rc = kwboot_xm_sendblock(tty, &block);
if (rc)
goto out;
N += n;
kwboot_progress(N * 100 / size, '.');
} while (1);
rc = kwboot_tty_send_char(tty, EOT);
out:
return rc;
can:
err = errno;
kwboot_tty_send_char(tty, CAN);
errno = err;
goto out;
}
static int
kwboot_term_pipe(int in, int out, char *quit, int *s)
{
ssize_t nin, nout;
char _buf[128], *buf = _buf;
nin = read(in, buf, sizeof(buf));
if (nin < 0)
return -1;
if (quit) {
int i;
for (i = 0; i < nin; i++) {
if (*buf == quit[*s]) {
(*s)++;
if (!quit[*s])
return 0;
buf++;
nin--;
} else
while (*s > 0) {
nout = write(out, quit, *s);
if (nout <= 0)
return -1;
(*s) -= nout;
}
}
}
while (nin > 0) {
nout = write(out, buf, nin);
if (nout <= 0)
return -1;
nin -= nout;
}
return 0;
}
static int
kwboot_terminal(int tty)
{
int rc, in, s;
char *quit = "\34c";
struct termios otio, tio;
rc = -1;
in = STDIN_FILENO;
if (isatty(in)) {
rc = tcgetattr(in, &otio);
if (!rc) {
tio = otio;
cfmakeraw(&tio);
rc = tcsetattr(in, TCSANOW, &tio);
}
if (rc) {
perror("tcsetattr");
goto out;
}
kwboot_printv("[Type Ctrl-%c + %c to quit]\r\n",
quit[0]|0100, quit[1]);
} else
in = -1;
rc = 0;
s = 0;
do {
fd_set rfds;
int nfds = 0;
FD_SET(tty, &rfds);
nfds = nfds < tty ? tty : nfds;
if (in >= 0) {
FD_SET(in, &rfds);
nfds = nfds < in ? in : nfds;
}
nfds = select(nfds + 1, &rfds, NULL, NULL, NULL);
if (nfds < 0)
break;
if (FD_ISSET(tty, &rfds)) {
rc = kwboot_term_pipe(tty, STDOUT_FILENO, NULL, NULL);
if (rc)
break;
}
if (FD_ISSET(in, &rfds)) {
rc = kwboot_term_pipe(in, tty, quit, &s);
if (rc)
break;
}
} while (quit[s] != 0);
tcsetattr(in, TCSANOW, &otio);
out:
return rc;
}
static void *
kwboot_mmap_image(const char *path, size_t *size, int prot)
{
int rc, fd, flags;
struct stat st;
void *img;
rc = -1;
fd = -1;
img = NULL;
fd = open(path, O_RDONLY);
if (fd < 0)
goto out;
rc = fstat(fd, &st);
if (rc)
goto out;
flags = (prot & PROT_WRITE) ? MAP_PRIVATE : MAP_SHARED;
img = mmap(NULL, st.st_size, prot, flags, fd, 0);
if (img == MAP_FAILED) {
img = NULL;
goto out;
}
rc = 0;
*size = st.st_size;
out:
if (rc && img) {
munmap(img, st.st_size);
img = NULL;
}
if (fd >= 0)
close(fd);
return img;
}
static void
kwboot_usage(FILE *stream, char *progname)
{
fprintf(stream,
"Usage: %s [-d | -b <image>] [ -p ] [ -t ] "
"[-B <baud> ] <TTY>\n", progname);
fprintf(stream, "\n");
fprintf(stream, " -b <image>: boot <image>\n");
fprintf(stream, " -d: enter debug mode\n");
fprintf(stream, "\n");
fprintf(stream, " -t: mini terminal\n");
fprintf(stream, "\n");
fprintf(stream, " -B <baud>: set baud rate\n");
fprintf(stream, "\n");
}
int
main(int argc, char **argv)
{
const char *ttypath, *imgpath;
int rv, rc, tty, term;
void *bootmsg;
void *debugmsg;
void *img;
size_t size;
speed_t speed;
rv = 1;
tty = -1;
bootmsg = NULL;
debugmsg = NULL;
imgpath = NULL;
img = NULL;
term = 0;
size = 0;
speed = B115200;
kwboot_verbose = isatty(STDOUT_FILENO);
do {
int c = getopt(argc, argv, "hb:dptB:");
if (c < 0)
break;
switch (c) {
case 'b':
bootmsg = kwboot_msg_boot;
imgpath = optarg;
break;
case 'd':
debugmsg = kwboot_msg_debug;
break;
case 't':
term = 1;
break;
case 'B':
speed = kwboot_tty_speed(atoi(optarg));
if (speed == -1)
goto usage;
break;
case 'h':
rv = 0;
default:
goto usage;
}
} while (1);
if (!bootmsg && !term && !debugmsg)
goto usage;
if (argc - optind < 1)
goto usage;
ttypath = argv[optind++];
tty = kwboot_open_tty(ttypath, speed);
if (tty < 0) {
perror(ttypath);
goto out;
}
if (imgpath) {
img = kwboot_mmap_image(imgpath, &size, PROT_READ);
if (!img) {
perror(imgpath);
goto out;
}
}
if (debugmsg) {
rc = kwboot_debugmsg(tty, debugmsg);
if (rc) {
perror("debugmsg");
goto out;
}
}
if (bootmsg) {
rc = kwboot_bootmsg(tty, bootmsg);
if (rc) {
perror("bootmsg");
goto out;
}
}
if (img) {
rc = kwboot_xmodem(tty, img, size);
if (rc) {
perror("xmodem");
goto out;
}
}
if (term) {
rc = kwboot_terminal(tty);
if (rc && !(errno == EINTR)) {
perror("terminal");
goto out;
}
}
rv = 0;
out:
if (tty >= 0)
close(tty);
if (img)
munmap(img, size);
return rv;
usage:
kwboot_usage(rv ? stderr : stdout, basename(argv[0]));
goto out;
}