u-boot/tools/kwboot.c
Stefan Roese f4db6c976c arm: mvebu: Add runtime detection of UART (xmodem) boot-mode
This patch adds runtime detection of the Marvell UART boot-mode (xmodem
protocol). If this boot-mode is detected, SPL will return to the
BootROM to continue the UART booting.

With this patch its now possible, to generate a U-Boot image that
can be booted either from the strapped boot-device (e.g. SPI NOR, MMC,
etc) or via the xmodem protocol from the UART. In the UART case,
the kwboot tool will dynamically insert the UART boot-device type
into the image. And also patch the load address in the header, so
that the mkimage header will be skipped (as its not expected by the
Marvell BootROM).

This simplifies the development for Armada XP / 38x based boards.
As no special images need to be generated by selecting the
MVEBU_BOOTROM_UARTBOOT Kconfig option.

Since the Kconfig option MVEBU_BOOTROM_UARTBOOT is not needed any
more, its now completely removed.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Dirk Eibach <dirk.eibach@gdsys.cc>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Kevin Smith <kevin.smith@elecsyscorp.com>
2016-01-14 14:08:59 +01:00

862 lines
14 KiB
C

/*
* Boot a Marvell SoC, with Xmodem over UART0.
* supports Kirkwood, Dove, Armada 370, Armada XP
*
* (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 "kwbimage.h"
#include "mkimage.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <image.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>
#ifdef __GNUC__
#define PACKED __attribute((packed))
#else
#define PACKED
#endif
/*
* 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
};
/* Defines known to work on Kirkwood */
#define KWBOOT_MSG_REQ_DELAY 10 /* ms */
#define KWBOOT_MSG_RSP_TIMEO 50 /* ms */
/* Defines known to work on Armada XP */
#define KWBOOT_MSG_REQ_DELAY_AXP 1000 /* ms */
#define KWBOOT_MSG_RSP_TIMEO_AXP 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;
} PACKED;
#define KWBOOT_BLK_RSP_TIMEO 1000 /* ms */
static int kwboot_verbose;
static int msg_req_delay = KWBOOT_MSG_REQ_DELAY;
static int msg_rsp_timeo = KWBOOT_MSG_RSP_TIMEO;
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;
if (!buf)
return 0;
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;
if (msg == NULL)
kwboot_printv("Please reboot the target into UART boot mode...");
else
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(msg_req_delay * 1000);
continue;
}
rc = kwboot_tty_recv(tty, &c, 1, 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(msg_req_delay * 1000);
continue;
}
rc = kwboot_tty_recv(tty, buf, 16, 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->soh = SOH;
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;
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 uint8_t
kwboot_img_csum8(void *_data, size_t size)
{
uint8_t *data = _data, csum;
for (csum = 0; size-- > 0; data++)
csum += *data;
return csum;
}
static int
kwboot_img_patch_hdr(void *img, size_t size)
{
int rc;
struct main_hdr_v1 *hdr;
uint8_t csum;
size_t hdrsz = sizeof(*hdr);
int image_ver;
rc = -1;
hdr = img;
if (size < hdrsz) {
errno = EINVAL;
goto out;
}
image_ver = image_version(img);
if (image_ver < 0) {
fprintf(stderr, "Invalid image header version\n");
errno = EINVAL;
goto out;
}
if (image_ver == 0)
hdrsz = sizeof(*hdr);
else
hdrsz = KWBHEADER_V1_SIZE(hdr);
csum = kwboot_img_csum8(hdr, hdrsz) - hdr->checksum;
if (csum != hdr->checksum) {
errno = EINVAL;
goto out;
}
if (hdr->blockid == IBR_HDR_UART_ID) {
rc = 0;
goto out;
}
hdr->blockid = IBR_HDR_UART_ID;
/*
* Subtract mkimage header size from destination address
* as this header is not expected by the Marvell BootROM.
* This way, the execution address is identical to the
* one the image is compiled for (TEXT_BASE).
*/
hdr->destaddr = hdr->destaddr - sizeof(struct image_header);
if (image_ver == 0) {
struct main_hdr_v0 *hdr_v0 = img;
hdr_v0->nandeccmode = IBR_HDR_ECC_DISABLED;
hdr_v0->nandpagesize = 0;
hdr_v0->srcaddr = hdr_v0->ext
? sizeof(struct kwb_header)
: sizeof(*hdr_v0);
}
hdr->checksum = kwboot_img_csum8(hdr, hdrsz) - csum;
rc = 0;
out:
return rc;
}
static void
kwboot_usage(FILE *stream, char *progname)
{
fprintf(stream,
"Usage: %s [-d | -a | -q <req-delay> | -s <resp-timeo> | -b <image> | -D <image> ] [ -t ] [-B <baud> ] <TTY>\n",
progname);
fprintf(stream, "\n");
fprintf(stream,
" -b <image>: boot <image> with preamble (Kirkwood, Armada 370/XP)\n");
fprintf(stream, " -p: patch <image> to type 0x69 (uart boot)\n");
fprintf(stream,
" -D <image>: boot <image> without preamble (Dove)\n");
fprintf(stream, " -d: enter debug mode\n");
fprintf(stream, " -a: use timings for Armada XP\n");
fprintf(stream, " -q <req-delay>: use specific request-delay\n");
fprintf(stream, " -s <resp-timeo>: use specific response-timeout\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, prot, patch;
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;
patch = 0;
size = 0;
speed = B115200;
kwboot_verbose = isatty(STDOUT_FILENO);
do {
int c = getopt(argc, argv, "hb:ptaB:dD:q:s:");
if (c < 0)
break;
switch (c) {
case 'b':
bootmsg = kwboot_msg_boot;
imgpath = optarg;
break;
case 'D':
bootmsg = NULL;
imgpath = optarg;
break;
case 'd':
debugmsg = kwboot_msg_debug;
break;
case 'p':
patch = 1;
break;
case 't':
term = 1;
break;
case 'a':
msg_req_delay = KWBOOT_MSG_REQ_DELAY_AXP;
msg_rsp_timeo = KWBOOT_MSG_RSP_TIMEO_AXP;
break;
case 'q':
msg_req_delay = atoi(optarg);
break;
case 's':
msg_rsp_timeo = atoi(optarg);
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 (patch && !imgpath)
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) {
prot = PROT_READ | (patch ? PROT_WRITE : 0);
img = kwboot_mmap_image(imgpath, &size, prot);
if (!img) {
perror(imgpath);
goto out;
}
}
if (patch) {
rc = kwboot_img_patch_hdr(img, size);
if (rc) {
fprintf(stderr, "%s: Invalid image.\n", imgpath);
goto out;
}
}
if (debugmsg) {
rc = kwboot_debugmsg(tty, debugmsg);
if (rc) {
perror("debugmsg");
goto out;
}
} else {
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;
}