Start to make it easier to add AT91RM9200 based boards:

o Copy kb920x_machdep.c to at91_machdep.c
o Move board_init to new board_kb920x.c
o rename ramsize to at91_ramsize and make it accessible to board_* files.
o Delete files.kb920x.  We can do this selection with the new boards.
o Add a stub for the tsc4370 board init, which will be added in
  a future commit.
o Add new 'devices' at91_board_kb920x and at91_board_tsc4370.  More are
  needed and will be added in future commits.

Reviewed by:	stass, cognet

1 files changed, 81 insertions, 0 deletions

diff --git a/sys/arm/at91/board_kb920x.c b/sys/arm/at91/board_kb920x.c
new file mode 100644
index 0000000..a8104fc
--- /dev/null
+++ b/sys/arm/at91/board_kb920x.c
@@ -0,0 +1,81 @@
+/*-
+ * Copyright (c) 2005-2008 Olivier Houchard.  All rights reserved.
+ * Copyright (c) 2005-2008 Warner Losh.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "opt_at91.h"
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+#include <sys/param.h>
+#include <sys/systm.h>
+
+#include <arm/at91/at91board.h>
+#include <arm/at91/at91rm92reg.h>
+#include <arm/at91/at91_piovar.h>
+#include <arm/at91/at91_pio_rm9200.h>
+
+long
+board_init(void)
+{
+	/*
+	 * Since the USART supports RS-485 multidrop mode, it allows the
+	 * TX pins to float.  However, for RS-232 operations, we don't want
+	 * these pins to float.  Instead, they should be pulled up to avoid
+	 * mismatches.  Linux does something similar when it configures the
+	 * TX lines.  This implies that we also allow the RX lines to float
+	 * rather than be in the state they are left in by the boot loader.
+	 * Since they are input pins, I think that this is the right thing
+	 * to do.
+	 */
+
+	/* PIOA's A periph: Turn USART 0 and 2's TX/RX pins */
+	at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
+	    AT91C_PA18_RXD0 | AT91C_PA22_RXD2, 0);
+	at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
+	    AT91C_PA17_TXD0 | AT91C_PA23_TXD2, 1);
+	/* PIOA's B periph: Turn USART 3's TX/RX pins */
+	at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA6_RXD3, 0);
+	at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA5_TXD3, 1);
+#ifdef AT91_TSC
+	/* We're using TC0's A1 and A2 input */
+	at91_pio_use_periph_b(AT91RM92_PIOA_BASE,
+	    AT91C_PA19_TIOA1 | AT91C_PA21_TIOA2, 0);
+#endif
+	/* PIOB's A periph: Turn USART 1's TX/RX pins */
+	at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB21_RXD1, 0);
+	at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB20_TXD1, 1);
+
+	/* Pin assignment */
+#ifdef AT91_TSC
+	/* Assert PA24 low -- talk to rubidium */
+	at91_pio_use_gpio(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
+	at91_pio_gpio_output(AT91RM92_PIOA_BASE, AT91C_PIO_PA24, 0);
+	at91_pio_gpio_clear(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
+	at91_pio_use_gpio(AT91RM92_PIOB_BASE,
+	    AT91C_PIO_PB16 | AT91C_PIO_PB17 | AT91C_PIO_PB18 | AT91C_PIO_PB19);
+#endif
+
+	return (at91_ramsize());
+}