mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 10:43:06 +00:00
54841ab50c
The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands. Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".
This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:
int main (int argc, char **argv)
{
while (--argc > 0 && **++argv == '-') {
/* ====> */ while (*++*argv) {
switch (**argv) {
case 'd':
debug++;
break;
...
default:
usage ();
}
}
}
...
}
The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell. With the modification, the compiler will prevent this with
an
error: increment of read-only location '*argv'
N.B.: The code above can be trivially rewritten like this:
while (--argc > 0 && **++argv == '-') {
char *arg = *argv;
while (*++arg) {
switch (*arg) {
...
Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
394 lines
9.1 KiB
C
394 lines
9.1 KiB
C
/*
|
|
* (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
|
|
*
|
|
* Copyright 2005, Seagate Technology LLC
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <config.h>
|
|
#include <net.h>
|
|
|
|
#include "vct.h"
|
|
|
|
#define SMSC9118_BASE CONFIG_DRIVER_SMC911X_BASE
|
|
#define BYTE_TEST (SMSC9118_BASE + 0x64)
|
|
#define GPIO_CFG (SMSC9118_BASE + 0x88)
|
|
#define MAC_CSR_CMD (SMSC9118_BASE + 0xA4)
|
|
#define MAC_CSR_CMD_CSR_BUSY (0x80000000)
|
|
#define MAC_CSR_CMD_RNW (0x40000000)
|
|
#define MAC_RD_CMD(reg) ((reg & 0x000000FF) | \
|
|
(MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_RNW))
|
|
#define MAC_WR_CMD(reg) ((reg & 0x000000FF) | \
|
|
(MAC_CSR_CMD_CSR_BUSY))
|
|
#define MAC_CSR_DATA (SMSC9118_BASE + 0xA8)
|
|
#define E2P_CMD (SMSC9118_BASE + 0xB0)
|
|
#define E2P_CMD_EPC_BUSY_ (0x80000000UL) /* Self Clearing */
|
|
#define E2P_CMD_EPC_CMD_ (0x70000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_READ_ (0x00000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_EWDS_ (0x10000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_EWEN_ (0x20000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_WRITE_ (0x30000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_WRAL_ (0x40000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_ERASE_ (0x50000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_ERAL_ (0x60000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_CMD_RELOAD_ (0x70000000UL) /* R/W */
|
|
#define E2P_CMD_EPC_TIMEOUT_ (0x00000200UL) /* R */
|
|
#define E2P_CMD_MAC_ADDR_LOADED_ (0x00000100UL) /* RO */
|
|
#define E2P_CMD_EPC_ADDR_ (0x000000FFUL) /* R/W */
|
|
#define E2P_DATA (SMSC9118_BASE + 0xB4)
|
|
|
|
#define MAC_ADDRH (0x2)
|
|
#define MAC_ADDRL (0x3)
|
|
|
|
#define MAC_TIMEOUT 200
|
|
|
|
#define HIBYTE(word) ((u8)(((u16)(word)) >> 8))
|
|
#define LOBYTE(word) ((u8)(((u16)(word)) & 0x00FFU))
|
|
#define HIWORD(dword) ((u16)(((u32)(dword)) >> 16))
|
|
#define LOWORD(dword) ((u16)(((u32)(dword)) & 0x0000FFFFUL))
|
|
|
|
static int mac_busy(int req_to)
|
|
{
|
|
int timeout = req_to;
|
|
|
|
while (timeout--) {
|
|
if (!(smc911x_reg_read(MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY))
|
|
goto done;
|
|
}
|
|
return 1; /* Timeout */
|
|
|
|
done:
|
|
return 0; /* No timeout */
|
|
}
|
|
|
|
static ulong get_mac_reg(int reg)
|
|
{
|
|
ulong reg_val = 0xffffffff;
|
|
|
|
if (smc911x_reg_read(MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY) {
|
|
printf("get_mac_reg: previous command not complete\n");
|
|
goto done;
|
|
}
|
|
|
|
smc911x_reg_write(MAC_CSR_CMD, MAC_RD_CMD(reg));
|
|
udelay(10000);
|
|
|
|
if (mac_busy(MAC_TIMEOUT) == 1) {
|
|
printf("get_mac_reg: timeout waiting for response from MAC\n");
|
|
goto done;
|
|
}
|
|
|
|
reg_val = smc911x_reg_read(MAC_CSR_DATA);
|
|
|
|
done:
|
|
return (reg_val);
|
|
}
|
|
|
|
static ulong eeprom_enable_access(void)
|
|
{
|
|
ulong gpio;
|
|
|
|
gpio = smc911x_reg_read(GPIO_CFG);
|
|
debug("%s: gpio= 0x%08lx ---> 0x%08lx\n", __func__, gpio,
|
|
(gpio & 0xFF0FFFFFUL));
|
|
|
|
smc911x_reg_write(GPIO_CFG, (gpio & 0xFF0FFFFFUL));
|
|
return gpio;
|
|
}
|
|
|
|
static void eeprom_disable_access(ulong gpio)
|
|
{
|
|
debug("%s: gpio= 0x%08lx\n", __func__, gpio);
|
|
smc911x_reg_write(GPIO_CFG, gpio);
|
|
}
|
|
|
|
static int eeprom_is_mac_address_loaded(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = smc911x_reg_read(MAC_CSR_CMD) & E2P_CMD_MAC_ADDR_LOADED_;
|
|
debug("%s: ret = %x\n", __func__, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int eeprom_read_location(unchar address, u8 *data)
|
|
{
|
|
ulong timeout = 100000;
|
|
ulong temp = 0;
|
|
|
|
if ((temp = smc911x_reg_read(E2P_CMD)) & E2P_CMD_EPC_BUSY_) {
|
|
printf("%s: Busy at start, E2P_CMD=0x%08lX\n", __func__, temp);
|
|
return 0;
|
|
}
|
|
|
|
smc911x_reg_write(E2P_CMD,
|
|
(E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_ |
|
|
((ulong) address)));
|
|
|
|
while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
|
|
udelay(10);
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout == 0) {
|
|
printf("Timeout\n");
|
|
return 0;
|
|
}
|
|
(*data) = (unchar) (smc911x_reg_read(E2P_DATA));
|
|
debug("%s: ret = %x\n", __func__, (*data));
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_enable_erase_and_write(void)
|
|
{
|
|
ulong timeout = 100000;
|
|
|
|
if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
|
|
printf("%s: Busy at start\n", __func__);
|
|
return 0;
|
|
}
|
|
smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_));
|
|
|
|
while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
|
|
udelay(10);
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout == 0) {
|
|
printf("Timeout[1]\n");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_disable_erase_and_write(void)
|
|
{
|
|
ulong timeout = 100000;
|
|
|
|
if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
|
|
printf("%s: Busy at start\n", __func__);
|
|
return 0;
|
|
}
|
|
smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWDS_));
|
|
|
|
while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
|
|
udelay(10);
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout == 0) {
|
|
printf("Timeout[2]\n");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_write_location(unchar address, unchar data)
|
|
{
|
|
ulong timeout = 100000;
|
|
|
|
debug("%s: address: %x data = %x\n", __func__, address, data);
|
|
|
|
if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
|
|
printf("%s: Busy at start\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
smc911x_reg_write(E2P_DATA, ((ulong) data));
|
|
smc911x_reg_write(E2P_CMD,
|
|
(E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_ |
|
|
((ulong) address)));
|
|
|
|
while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
|
|
udelay(10);
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout == 0) {
|
|
printf("Timeout[3]\n");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_erase_all(void)
|
|
{
|
|
ulong timeout = 100000;
|
|
|
|
if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
|
|
printf("%s: Busy at start\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_ERAL_));
|
|
|
|
while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
|
|
udelay(10);
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout == 0) {
|
|
printf("Timeout[4]\n");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_reload(void)
|
|
{
|
|
ulong timeout = 100000;
|
|
|
|
if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
|
|
printf("%s: Busy at start\n", __func__);
|
|
return -1;
|
|
}
|
|
smc911x_reg_write(E2P_CMD,
|
|
(E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_));
|
|
|
|
while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
|
|
udelay(10);
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout == 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_save_mac_address(ulong dwHi16, ulong dwLo32)
|
|
{
|
|
int result = 0;
|
|
|
|
debug("%s: dwHI: 0x%08lx dwLO: %08lx, \n", __func__, dwHi16, dwLo32);
|
|
|
|
if (!eeprom_enable_erase_and_write())
|
|
goto DONE;
|
|
if (!eeprom_erase_all())
|
|
goto DONE;
|
|
if (!eeprom_write_location(0, 0xA5))
|
|
goto DONE;
|
|
if (!eeprom_write_location(1, LOBYTE(LOWORD(dwLo32))))
|
|
goto DONE;
|
|
if (!eeprom_write_location(2, HIBYTE(LOWORD(dwLo32))))
|
|
goto DONE;
|
|
if (!eeprom_write_location(3, LOBYTE(HIWORD(dwLo32))))
|
|
goto DONE;
|
|
if (!eeprom_write_location(4, HIBYTE(HIWORD(dwLo32))))
|
|
goto DONE;
|
|
if (!eeprom_write_location(5, LOBYTE(LOWORD(dwHi16))))
|
|
goto DONE;
|
|
if (!eeprom_write_location(6, HIBYTE(LOWORD(dwHi16))))
|
|
goto DONE;
|
|
if (!eeprom_disable_erase_and_write())
|
|
goto DONE;
|
|
|
|
result = 1;
|
|
|
|
DONE:
|
|
return result;
|
|
}
|
|
|
|
static int do_eeprom_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
unchar data = 0, index = 0;
|
|
ulong gpio_old_val;
|
|
|
|
gpio_old_val = eeprom_enable_access();
|
|
|
|
printf("EEPROM content: \n");
|
|
for (index = 0; index < 8; index++) {
|
|
if (eeprom_read_location(index, &data))
|
|
printf("%02x ", data);
|
|
else
|
|
printf("FAILED");
|
|
}
|
|
|
|
eeprom_disable_access(gpio_old_val);
|
|
printf("\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_eeprom_erase_all(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
eeprom_erase_all();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_eeprom_save_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
ulong hi16, lo32;
|
|
unchar ethaddr[6], i;
|
|
ulong gpio;
|
|
char *tmp, *end;
|
|
|
|
tmp = argv[1];
|
|
for (i = 0; i < 6; i++) {
|
|
ethaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
|
|
if (tmp)
|
|
tmp = (*end) ? end + 1 : end;
|
|
}
|
|
|
|
hi16 = (ethaddr[5] << 8) | (ethaddr[4]);
|
|
lo32 = (ethaddr[3] << 24) | (ethaddr[2] << 16) |
|
|
(ethaddr[1] << 8) | (ethaddr[0]);
|
|
|
|
gpio = eeprom_enable_access();
|
|
|
|
eeprom_save_mac_address(hi16, lo32);
|
|
|
|
eeprom_reload();
|
|
|
|
/* Check new values */
|
|
if (eeprom_is_mac_address_loaded()) {
|
|
ulong mac_hi16, mac_lo32;
|
|
|
|
mac_hi16 = get_mac_reg(MAC_ADDRH);
|
|
mac_lo32 = get_mac_reg(MAC_ADDRL);
|
|
printf("New MAC address: %lx, %lx\n", mac_hi16, mac_lo32);
|
|
} else {
|
|
printf("Address is not reloaded \n");
|
|
}
|
|
eeprom_disable_access(gpio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_CMD(smcee, 1, 0, do_eeprom_erase_all,
|
|
"smcee - Erase content of SMC EEPROM",);
|
|
|
|
U_BOOT_CMD(smced, 1, 0, do_eeprom_dump,
|
|
"smced - Dump content of SMC EEPROM",);
|
|
|
|
U_BOOT_CMD(smcew, 2, 0, do_eeprom_save_mac,
|
|
"smcew - Write MAC address to SMC EEPROM\n",
|
|
"aa:bb:cc:dd:ee:ff new mac address");
|