cmd_bc3450.c

u-boot-1.1.6 源码包

		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 *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, CFG_STANDALONE);
			return 0;
		}
	}

	printf ("Usage:%s\n", cmdtp->help);
	return 1;
}

U_BOOT_CMD (temp, 3, 1, cmd_temp,
	    "temp    - print current temperature\n",
	    "\n" "temp\n" "     - print current temperature\n");

#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 *) (CFG_MBAR + 0x0900);
	struct mpc5xxx_mscan *can2 =
		(struct mpc5xxx_mscan *) (CFG_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 *argv[])
{
	int i;
	struct mpc5xxx_mscan *can1 =
		(struct mpc5xxx_mscan *) (CFG_MBAR + 0x0900);
	struct mpc5xxx_mscan *can2 =
		(struct mpc5xxx_mscan *) (CFG_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 *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, "test    - unit test routines\n", "\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!\n");
#endif /* CFG_CMD_BSP */