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u-boot/board/bc3450/cmd_bc3450.c
Wolfgang Denk 54841ab50c Make sure that argv[] argument pointers are not modified. 
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>
2010-07-04 23:55:42 +02:00

828 lines
19 KiB
C
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/*
* (C) Copyright 2005
* Stefan Strobl, GERSYS GmbH, stefan.strobl@gersys.de
*
* (C) Copyright 2005
* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de.
*
* 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 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
/*
* BC3450 specific commands
*/
#if defined(CONFIG_CMD_BSP)
#undef DEBUG
#ifdef DEBUG
# define dprintf(fmt,args...) printf(fmt, ##args)
#else
# define dprintf(fmt,args...)
#endif
/*
* Definitions for DS1620 chip
*/
#define THERM_START_CONVERT 0xee
#define THERM_RESET 0xaf
#define THERM_READ_CONFIG 0xac
#define THERM_READ_TEMP 0xaa
#define THERM_READ_TL 0xa2
#define THERM_READ_TH 0xa1
#define THERM_WRITE_CONFIG 0x0c
#define THERM_WRITE_TL 0x02
#define THERM_WRITE_TH 0x01
#define CONFIG_SYS_CPU 2
#define CONFIG_SYS_1SHOT 1
#define CONFIG_SYS_STANDALONE 0
struct therm {
int hi;
int lo;
};
/*
* SM501 Register
*/
#define SM501_GPIO_CTRL_LOW 0x00000008UL /* gpio pins 0..31 */
#define SM501_GPIO_CTRL_HIGH 0x0000000CUL /* gpio pins 32..63 */
#define SM501_POWER_MODE0_GATE 0x00000040UL
#define SM501_POWER_MODE1_GATE 0x00000048UL
#define POWER_MODE_GATE_GPIO_PWM_I2C 0x00000040UL
#define SM501_GPIO_DATA_LOW 0x00010000UL
#define SM501_GPIO_DATA_HIGH 0x00010004UL
#define SM501_GPIO_DATA_DIR_LOW 0x00010008UL
#define SM501_GPIO_DATA_DIR_HIGH 0x0001000CUL
#define SM501_PANEL_DISPLAY_CONTROL 0x00080000UL
#define SM501_CRT_DISPLAY_CONTROL 0x00080200UL
/* SM501 CRT Display Control Bits */
#define SM501_CDC_SEL (1 << 9)
#define SM501_CDC_TE (1 << 8)
#define SM501_CDC_E (1 << 2)
/* SM501 Panel Display Control Bits */
#define SM501_PDC_FPEN (1 << 27)
#define SM501_PDC_BIAS (1 << 26)
#define SM501_PDC_DATA (1 << 25)
#define SM501_PDC_VDDEN (1 << 24)
/* SM501 GPIO Data LOW Bits */
#define SM501_GPIO24 0x01000000
#define SM501_GPIO25 0x02000000
#define SM501_GPIO26 0x04000000
#define SM501_GPIO27 0x08000000
#define SM501_GPIO28 0x10000000
#define SM501_GPIO29 0x20000000
#define SM501_GPIO30 0x40000000
#define SM501_GPIO31 0x80000000
/* SM501 GPIO Data HIGH Bits */
#define SM501_GPIO46 0x00004000
#define SM501_GPIO47 0x00008000
#define SM501_GPIO48 0x00010000
#define SM501_GPIO49 0x00020000
#define SM501_GPIO50 0x00040000
#define SM501_GPIO51 0x00080000
/* BC3450 GPIOs @ SM501 Data LOW */
#define DIP (SM501_GPIO24 | SM501_GPIO25 | SM501_GPIO26 | SM501_GPIO27)
#define DS1620_DQ SM501_GPIO29 /* I/O */
#define DS1620_CLK SM501_GPIO30 /* High active O/P */
#define DS1620_RES SM501_GPIO31 /* Low active O/P */
/* BC3450 GPIOs @ SM501 Data HIGH */
#define BUZZER SM501_GPIO47 /* Low active O/P */
#define DS1620_TLOW SM501_GPIO48 /* High active I/P */
#define PWR_OFF SM501_GPIO49 /* Low active O/P */
#define FP_DATA_TRI SM501_GPIO50 /* High active O/P */
/*
* Initialise GPIO on SM501
*
* This function may be called from several other functions.
* Yet, the initialisation sequence is executed only the first
* time the function is called.
*/
int sm501_gpio_init (void)
{
static int init_done = 0;
if (init_done) {
/* dprintf("sm501_gpio_init: nothing to be done.\n"); */
return 1;
}
/* enable SM501 GPIO control (in both power modes) */
*(vu_long *) (SM501_MMIO_BASE + SM501_POWER_MODE0_GATE) |=
POWER_MODE_GATE_GPIO_PWM_I2C;
*(vu_long *) (SM501_MMIO_BASE + SM501_POWER_MODE1_GATE) |=
POWER_MODE_GATE_GPIO_PWM_I2C;
/* set up default O/Ps */
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
~(DS1620_RES | DS1620_CLK);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |= DS1620_DQ;
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
~(FP_DATA_TRI);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) |=
(BUZZER | PWR_OFF);
/* configure directions for SM501 GPIO pins */
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_CTRL_LOW) &= ~(0xFF << 24);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_CTRL_HIGH) &=
~(0x3F << 14);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) &=
~(DIP | DS1620_DQ);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) |=
(DS1620_RES | DS1620_CLK);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_HIGH) &=
~DS1620_TLOW;
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_HIGH) |=
(PWR_OFF | BUZZER | FP_DATA_TRI);
init_done = 1;
/* dprintf("sm501_gpio_init: done.\n"); */
return 0;
}
/*
* dip - read Config Inputs
*
* read and prints the dip switch
* and/or external config inputs (4bits) 0...0x0F
*/
int cmd_dip (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
vu_long rc = 0;
sm501_gpio_init ();
/* read dip switch */
rc = *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW);
rc = ~rc;
rc &= DIP;
rc = (int) (rc >> 24);
/* plausibility check */
if (rc > 0x0F)
return -1;
printf ("0x%lx\n", rc);
return 0;
}
U_BOOT_CMD (dip, 1, 1, cmd_dip,
"read dip switch and config inputs",
"\n"
" - prints the state of the dip switch and/or\n"
" external configuration inputs as hex value.\n"
" - \"Config 1\" is the LSB");
/*
* buz - turns Buzzer on/off
*/
#ifdef CONFIG_BC3450_BUZZER
static int cmd_buz (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
if (argc != 2) {
printf ("Usage:\nspecify one argument: \"on\" or \"off\"\n");
return 1;
}
sm501_gpio_init ();
if (strncmp (argv[1], "on", 2) == 0) {
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
~(BUZZER);
return 0;
} else if (strncmp (argv[1], "off", 3) == 0) {
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) |=
BUZZER;
return 0;
}
printf ("Usage:\nspecify one argument: \"on\" or \"off\"\n");
return 1;
}
U_BOOT_CMD (buz, 2, 1, cmd_buz,
"turns buzzer on/off",
"\n" "buz <on/off>\n" " - turns the buzzer on or off");
#endif /* CONFIG_BC3450_BUZZER */
/*
* fp - front panel commands
*/
static int cmd_fp (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
sm501_gpio_init ();
if (strncmp (argv[1], "on", 2) == 0) {
/* turn on VDD first */
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_VDDEN;
udelay (1000);
/* then put data on */
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_DATA;
/* wait some time and enable backlight */
udelay (1000);
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_BIAS;
udelay (1000);
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_FPEN;
return 0;
} else if (strncmp (argv[1], "off", 3) == 0) {
/* turn off the backlight first */
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_FPEN;
udelay (1000);
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_BIAS;
udelay (200000);
/* wait some time, then remove data */
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_DATA;
udelay (1000);
/* and remove VDD last */
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) &=
~SM501_PDC_VDDEN;
return 0;
} else if (strncmp (argv[1], "bl", 2) == 0) {
/* turn on/off backlight only */
if (strncmp (argv[2], "on", 2) == 0) {
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) |=
SM501_PDC_BIAS;
udelay (1000);
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) |=
SM501_PDC_FPEN;
return 0;
} else if (strncmp (argv[2], "off", 3) == 0) {
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) &=
~SM501_PDC_FPEN;
udelay (1000);
*(vu_long *) (SM501_MMIO_BASE +
SM501_PANEL_DISPLAY_CONTROL) &=
~SM501_PDC_BIAS;
return 0;
}
}
#ifdef CONFIG_BC3450_CRT
else if (strncmp (argv[1], "crt", 3) == 0) {
/* enables/disables the crt output (debug only) */
if (strncmp (argv[2], "on", 2) == 0) {
*(vu_long *) (SM501_MMIO_BASE +
SM501_CRT_DISPLAY_CONTROL) |=
(SM501_CDC_TE | SM501_CDC_E);
*(vu_long *) (SM501_MMIO_BASE +
SM501_CRT_DISPLAY_CONTROL) &=
~SM501_CDC_SEL;
return 0;
} else if (strncmp (argv[2], "off", 3) == 0) {
*(vu_long *) (SM501_MMIO_BASE +
SM501_CRT_DISPLAY_CONTROL) &=
~(SM501_CDC_TE | SM501_CDC_E);
*(vu_long *) (SM501_MMIO_BASE +
SM501_CRT_DISPLAY_CONTROL) |=
SM501_CDC_SEL;
return 0;
}
}
#endif /* CONFIG_BC3450_CRT */
printf ("Usage:%s\n", cmdtp->help);
return 1;
}
U_BOOT_CMD (fp, 3, 1, cmd_fp,
"front panes access functions",
"\n"
"fp bl <on/off>\n"
" - turns the CCFL backlight of the display on/off\n"
"fp <on/off>\n" " - turns the whole display on/off"
#ifdef CONFIG_BC3450_CRT
"\n"
"fp crt <on/off>\n"
" - enables/disables the crt output (debug only)"
#endif /* CONFIG_BC3450_CRT */
);
/*
* temp - DS1620 thermometer
*/
/* GERSYS BC3450 specific functions */
static inline void bc_ds1620_set_clk (int clk)
{
if (clk)
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |=
DS1620_CLK;
else
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
~DS1620_CLK;
}
static inline void bc_ds1620_set_data (int dat)
{
if (dat)
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |=
DS1620_DQ;
else
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
~DS1620_DQ;
}
static inline int bc_ds1620_get_data (void)
{
vu_long rc;
rc = *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW);
rc &= DS1620_DQ;
if (rc != 0)
rc = 1;
return (int) rc;
}
static inline void bc_ds1620_set_data_dir (int dir)
{
if (dir) /* in */
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) &= ~DS1620_DQ;
else /* out */
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) |= DS1620_DQ;
}
static inline void bc_ds1620_set_reset (int res)
{
if (res)
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |= DS1620_RES;
else
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &= ~DS1620_RES;
}
/* hardware independent functions */
static void ds1620_send_bits (int nr, int value)
{
int i;
for (i = 0; i < nr; i++) {
bc_ds1620_set_data (value & 1);
bc_ds1620_set_clk (0);
udelay (1);
bc_ds1620_set_clk (1);
udelay (1);
value >>= 1;
}
}
static unsigned int ds1620_recv_bits (int nr)
{
unsigned int value = 0, mask = 1;
int i;
bc_ds1620_set_data (0);
for (i = 0; i < nr; i++) {
bc_ds1620_set_clk (0);
udelay (1);
if (bc_ds1620_get_data ())
value |= mask;
mask <<= 1;
bc_ds1620_set_clk (1);
udelay (1);
}
return value;
}
static void ds1620_out (int cmd, int bits, int value)
{
bc_ds1620_set_clk (1);
bc_ds1620_set_data_dir (0);
bc_ds1620_set_reset (0);
udelay (1);
bc_ds1620_set_reset (1);
udelay (1);
ds1620_send_bits (8, cmd);
if (bits)
ds1620_send_bits (bits, value);
udelay (1);
/* go stand alone */
bc_ds1620_set_data_dir (1);
bc_ds1620_set_reset (0);
bc_ds1620_set_clk (0);
udelay (10000);
}
static unsigned int ds1620_in (int cmd, int bits)
{
unsigned int value;
bc_ds1620_set_clk (1);
bc_ds1620_set_data_dir (0);
bc_ds1620_set_reset (0);
udelay (1);
bc_ds1620_set_reset (1);
udelay (1);
ds1620_send_bits (8, cmd);
bc_ds1620_set_data_dir (1);
value = ds1620_recv_bits (bits);
/* go stand alone */
bc_ds1620_set_data_dir (1);
bc_ds1620_set_reset (0);
bc_ds1620_set_clk (0);
return value;
}
static int cvt_9_to_int (unsigned int val)
{
if (val & 0x100)
val |= 0xfffffe00;
return val;
}
/* set thermostate thresholds */
static void ds1620_write_state (struct therm *therm)
{
ds1620_out (THERM_WRITE_TL, 9, therm->lo);
ds1620_out (THERM_WRITE_TH, 9, therm->hi);
ds1620_out (THERM_START_CONVERT, 0, 0);
}
static int cmd_temp (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
int i;
struct therm therm;
sm501_gpio_init ();
/* print temperature */
if (argc == 1) {
i = cvt_9_to_int (ds1620_in (THERM_READ_TEMP, 9));
printf ("%d.%d C\n", i >> 1, i & 1 ? 5 : 0);
return 0;
}
/* set to default operation */
if (strncmp (argv[1], "set", 3) == 0) {
if (strncmp (argv[2], "default", 3) == 0) {
therm.hi = +88;
therm.lo = -20;
therm.hi <<= 1;
therm.lo <<= 1;
ds1620_write_state (&therm);
ds1620_out (THERM_WRITE_CONFIG, 8, CONFIG_SYS_STANDALONE);
return 0;
}
}
printf ("Usage:%s\n", cmdtp->help);
return 1;
}
U_BOOT_CMD (temp, 3, 1, cmd_temp,
"print current temperature",
"\n" "temp\n" " - print current temperature");
#ifdef CONFIG_BC3450_CAN
/*
* Initialise CAN interface
*
* return 1 on CAN initialization failure
* return 0 if no failure
*/
int can_init (void)
{
static int init_done = 0;
int i;
struct mpc5xxx_mscan *can1 =
(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0900);
struct mpc5xxx_mscan *can2 =
(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0980);
/* GPIO configuration of the CAN pins is done in BC3450.h */
if (!init_done) {
/* init CAN 1 */
can1->canctl1 |= 0x80; /* CAN enable */
udelay (100);
i = 0;
can1->canctl0 |= 0x02; /* sleep mode */
/* wait until sleep mode reached */
while (!(can1->canctl1 & 0x02)) {
udelay (10);
i++;
if (i == 10) {
printf ("%s: CAN1 initialize error, "
"can not enter sleep mode!\n",
__FUNCTION__);
return 1;
}
}
i = 0;
can1->canctl0 = 0x01; /* enter init mode */
/* wait until init mode reached */
while (!(can1->canctl1 & 0x01)) {
udelay (10);
i++;
if (i == 10) {
printf ("%s: CAN1 initialize error, "
"can not enter init mode!\n",
__FUNCTION__);
return 1;
}
}
can1->canctl1 = 0x80;
can1->canctl1 |= 0x40;
can1->canbtr0 = 0x0F;
can1->canbtr1 = 0x7F;
can1->canidac &= ~(0x30);
can1->canidar1 = 0x00;
can1->canidar3 = 0x00;
can1->canidar5 = 0x00;
can1->canidar7 = 0x00;
can1->canidmr0 = 0xFF;
can1->canidmr1 = 0xFF;
can1->canidmr2 = 0xFF;
can1->canidmr3 = 0xFF;
can1->canidmr4 = 0xFF;
can1->canidmr5 = 0xFF;
can1->canidmr6 = 0xFF;
can1->canidmr7 = 0xFF;
i = 0;
can1->canctl0 &= ~(0x01); /* leave init mode */
can1->canctl0 &= ~(0x02);
/* wait until init and sleep mode left */
while ((can1->canctl1 & 0x01) || (can1->canctl1 & 0x02)) {
udelay (10);
i++;
if (i == 10) {
printf ("%s: CAN1 initialize error, "
"can not leave init/sleep mode!\n",
__FUNCTION__);
return 1;
}
}
/* init CAN 2 */
can2->canctl1 |= 0x80; /* CAN enable */
udelay (100);
i = 0;
can2->canctl0 |= 0x02; /* sleep mode */
/* wait until sleep mode reached */
while (!(can2->canctl1 & 0x02)) {
udelay (10);
i++;
if (i == 10) {
printf ("%s: CAN2 initialize error, "
"can not enter sleep mode!\n",
__FUNCTION__);
return 1;
}
}
i = 0;
can2->canctl0 = 0x01; /* enter init mode */
/* wait until init mode reached */
while (!(can2->canctl1 & 0x01)) {
udelay (10);
i++;
if (i == 10) {
printf ("%s: CAN2 initialize error, "
"can not enter init mode!\n",
__FUNCTION__);
return 1;
}
}
can2->canctl1 = 0x80;
can2->canctl1 |= 0x40;
can2->canbtr0 = 0x0F;
can2->canbtr1 = 0x7F;
can2->canidac &= ~(0x30);
can2->canidar1 = 0x00;
can2->canidar3 = 0x00;
can2->canidar5 = 0x00;
can2->canidar7 = 0x00;
can2->canidmr0 = 0xFF;
can2->canidmr1 = 0xFF;
can2->canidmr2 = 0xFF;
can2->canidmr3 = 0xFF;
can2->canidmr4 = 0xFF;
can2->canidmr5 = 0xFF;
can2->canidmr6 = 0xFF;
can2->canidmr7 = 0xFF;
can2->canctl0 &= ~(0x01); /* leave init mode */
can2->canctl0 &= ~(0x02);
i = 0;
/* wait until init mode left */
while ((can2->canctl1 & 0x01) || (can2->canctl1 & 0x02)) {
udelay (10);
i++;
if (i == 10) {
printf ("%s: CAN2 initialize error, "
"can not leave init/sleep mode!\n",
__FUNCTION__);
return 1;
}
}
init_done = 1;
}
return 0;
}
/*
* Do CAN test
* by sending message between CAN1 and CAN2
*
* return 1 on CAN failure
* return 0 if no failure
*/
int do_can (char * const argv[])
{
int i;
struct mpc5xxx_mscan *can1 =
(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0900);
struct mpc5xxx_mscan *can2 =
(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0980);
/* send a message on CAN1 */
can1->cantbsel = 0x01;
can1->cantxfg.idr[0] = 0x55;
can1->cantxfg.idr[1] = 0x00;
can1->cantxfg.idr[1] &= ~0x8;
can1->cantxfg.idr[1] &= ~0x10;
can1->cantxfg.dsr[0] = 0xCC;
can1->cantxfg.dlr = 1;
can1->cantxfg.tbpr = 0;
can1->cantflg = 0x01;
i = 0;
while ((can1->cantflg & 0x01) == 0) {
i++;
if (i == 10) {
printf ("%s: CAN1 send timeout, "
"can not send message!\n", __FUNCTION__);
return 1;
}
udelay (1000);
}
udelay (1000);
i = 0;
while (!(can2->canrflg & 0x01)) {
i++;
if (i == 10) {
printf ("%s: CAN2 receive timeout, "
"no message received!\n", __FUNCTION__);
return 1;
}
udelay (1000);
}
if (can2->canrxfg.dsr[0] != 0xCC) {
printf ("%s: CAN2 receive error, "
"data mismatch!\n", __FUNCTION__);
return 1;
}
/* send a message on CAN2 */
can2->cantbsel = 0x01;
can2->cantxfg.idr[0] = 0x55;
can2->cantxfg.idr[1] = 0x00;
can2->cantxfg.idr[1] &= ~0x8;
can2->cantxfg.idr[1] &= ~0x10;
can2->cantxfg.dsr[0] = 0xCC;
can2->cantxfg.dlr = 1;
can2->cantxfg.tbpr = 0;
can2->cantflg = 0x01;
i = 0;
while ((can2->cantflg & 0x01) == 0) {
i++;
if (i == 10) {
printf ("%s: CAN2 send error, "
"can not send message!\n", __FUNCTION__);
return 1;
}
udelay (1000);
}
udelay (1000);
i = 0;
while (!(can1->canrflg & 0x01)) {
i++;
if (i == 10) {
printf ("%s: CAN1 receive timeout, "
"no message received!\n", __FUNCTION__);
return 1;
}
udelay (1000);
}
if (can1->canrxfg.dsr[0] != 0xCC) {
printf ("%s: CAN1 receive error 0x%02x\n",
__FUNCTION__, (can1->canrxfg.dsr[0]));
return 1;
}
return 0;
}
#endif /* CONFIG_BC3450_CAN */
/*
* test - BC3450 HW test routines
*/
int cmd_test (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
#ifdef CONFIG_BC3450_CAN
int rcode;
can_init ();
#endif /* CONFIG_BC3450_CAN */
sm501_gpio_init ();
if (argc != 2) {
printf ("Usage:%s\n", cmdtp->help);
return 1;
}
if (strncmp (argv[1], "unit-off", 8) == 0) {
printf ("waiting 2 seconds...\n");
udelay (2000000);
*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
~PWR_OFF;
return 0;
}
#ifdef CONFIG_BC3450_CAN
else if (strncmp (argv[1], "can", 2) == 0) {
rcode = do_can (argv);
if (simple_strtoul (argv[2], NULL, 10) == 2) {
if (rcode == 0)
printf ("OK\n");
else
printf ("Error\n");
}
return rcode;
}
#endif /* CONFIG_BC3450_CAN */
printf ("Usage:%s\n", cmdtp->help);
return 1;
}
U_BOOT_CMD (test, 2, 1, cmd_test, "unit test routines", "\n"
#ifdef CONFIG_BC3450_CAN
"test can\n"
" - connect CAN1 (X8) with CAN2 (X9) for this test\n"
#endif /* CONFIG_BC3450_CAN */
"test unit-off\n"
" - turns off the BC3450 unit\n"
" WARNING: Unsaved environment variables will be lost!"
);
#endif
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