board/bc3450/cmd_bc3450.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2005
  * Stefan Strobl, GERSYS GmbH, stefan.strobl@gersys.de
  *
  * (C) Copyright 2005
  * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <command.h>

 /*
  * BC3450 specific commands
  */
 #if defined(CONFIG_CMD_BSP)

 /*
  * 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_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) {
 		debug("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;
 	debug("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
	/*
	* (C) Copyright 2005
	* Stefan Strobl, GERSYS GmbH, stefan.strobl@gersys.de
	*
	* (C) Copyright 2005
	* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <command.h>

	/*
	* BC3450 specific commands
	*/
	#if defined(CONFIG_CMD_BSP)

	/*
	* 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_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) {
	debug("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;
	debug("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