/* $NetBSD: ar5312_board.c,v 1.5 2015/06/09 22:50:50 matt Exp $ */
/*
* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
* Copyright (c) 2006 Garrett D'Amore.
* All rights reserved.
*
* This code was written by Garrett D'Amore for the Champaign-Urbana
* Community Wireless Network Project.
*
* 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.
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgements:
* This product includes software developed by the Urbana-Champaign
* Independent Media Center.
* This product includes software developed by Garrett D'Amore.
* 4. Urbana-Champaign Independent Media Center's name and Garrett
* D'Amore's name may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
* MEDIA CENTER AND GARRETT D'AMORE ``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 THE URBANA-CHAMPAIGN INDEPENDENT
* MEDIA CENTER OR GARRETT D'AMORE 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ar5312_board.c,v 1.5 2015/06/09 22:50:50 matt Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <mips/cpuregs.h>
#include <mips/atheros/include/ar5312reg.h>
#include <mips/atheros/include/platform.h>
#include <ah_soc.h>
extern const char *ether_sprintf(const uint8_t *);
/*
* Locate the Board Configuration data using heuristics.
* Search backward from the (aliased) end of flash looking
* for the signature string that marks the start of the data.
* We search at most 500KB.
*/
static const struct ar531x_boarddata *
ar5312_get_board_info(void)
{
static const struct ar531x_boarddata *board = NULL;
const uint8_t *ptr, *end;
uint32_t fctl;
if (board == NULL) {
/* configure flash bank 0 */
fctl = REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_0) &
AR5312_FLASHCTL_MW;
fctl |=
AR5312_FLASHCTL_E |
AR5312_FLASHCTL_RBLE |
AR5312_FLASHCTL_AC_8M |
__SHIFTIN(1, AR5312_FLASHCTL_IDCY) |
__SHIFTIN(7, AR5312_FLASHCTL_WST1) |
__SHIFTIN(7, AR5312_FLASHCTL_WST2);
REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_0) = fctl;
REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_1) &=
~(AR5312_FLASHCTL_E | AR5312_FLASHCTL_AC);
REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_2) &=
~(AR5312_FLASHCTL_E | AR5312_FLASHCTL_AC);
/* search backward in the flash looking for the signature */
ptr = (const uint8_t *) MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END - 0x1000);
end = ptr - (500 * 1024); /* NB: max 500KB window */
/* XXX validate end */
for (; ptr > end; ptr -= 0x1000)
if (*(const uint32_t *)ptr == AR531X_BD_MAGIC) {
board = (const struct ar531x_boarddata *) ptr;
break;
}
}
return board;
}
/*
* Locate the radio configuration data; it is located relative
* to the board configuration data.
*/
static const void *
ar5312_get_radio_info(void)
{
static const void *radio = NULL;
const struct ar531x_boarddata *board;
const uint8_t *baddr, *ptr, *end;
if (radio == NULL) {
board = ar5312_get_board_info();
if (board == NULL)
return NULL;
baddr = (const uint8_t *) board;
ptr = baddr + 0x1000;
end = (const uint8_t *)
MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END-0x1000);
again:
for (; ptr < end; ptr += 0x1000)
if (*(const uint32_t *)ptr != 0xffffffff) {
radio = ptr;
goto done;
}
/* sort of an Algol-style for loop ... */
if (end == (uint8_t *) MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END)) {
/* NB: AR2316 has radio data in a different location */
ptr = baddr + 0xf8;
end = (const uint8_t *)
MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END-0x1000 + 0xf8);
goto again;
}
}
done:
return radio;
}
const struct atheros_boardsw ar5312_boardsw = {
.absw_get_board_info = ar5312_get_board_info,
.absw_get_radio_info = ar5312_get_radio_info,
};
