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/*-
* Copyright (c) 2014 M. 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <arm/at91/at91reg.h>
#include <arm/at91/at91_smc.h>
#include <arm/at91/at91sam9260reg.h>
/*
* RD4HW()/WR4HW() read and write at91 hardware register space directly. They
* serve the same purpose as the RD4()/WR4() idiom you see in many drivers,
* except that those translate to bus_space calls, but in this code we need to
* access some devices before bus_space is ready to use. Of course for this to
* work the appropriate static device mappings need to be made in machdep.c.
*/
static inline uint32_t
RD4HW(uint32_t devbase, uint32_t regoff)
{
return *(volatile uint32_t *)(AT91_BASE + devbase + regoff);
}
static inline void
WR4HW(uint32_t devbase, uint32_t regoff, uint32_t val)
{
*(volatile uint32_t *)(AT91_BASE + devbase + regoff) = val;
}
void
at91_smc_setup(int id, int cs, const struct at91_smc_init *smc)
{
// Need a generic way to get this address for all SoCs... Assume 9260 for now...
uint32_t base = AT91SAM9260_SMC_BASE + SMC_CS_OFF(cs);
WR4HW(base, SMC_SETUP, SMC_SETUP_NCS_RD_SETUP(smc->ncs_rd_setup) |
SMC_SETUP_NRD_SETUP(smc->nrd_setup) |
SMC_SETUP_NCS_WR_SETUP(smc->ncs_wr_setup) |
SMC_SETUP_NWE_SETUP(smc->nwe_setup));
WR4HW(base, SMC_PULSE, SMC_PULSE_NCS_RD_PULSE(smc->ncs_rd_pulse) |
SMC_PULSE_NRD_PULSE(smc->nrd_pulse) |
SMC_PULSE_NCS_WR_PULSE(smc->ncs_wr_pulse) |
SMC_PULSE_NWE_PULSE(smc->nwe_pulse));
WR4HW(base, SMC_CYCLE, SMC_CYCLE_NRD_CYCLE(smc->nrd_cycle) |
SMC_CYCLE_NWE_CYCLE(smc->nwe_cycle));
WR4HW(base, SMC_MODE, smc->mode | SMC_MODE_TDF_CYCLES(smc->tdf_cycles));
}
void
at91_ebi_enable(int bank)
{
WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, (1 << bank) |
RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
}
void
at91_ebi_disable(int bank)
{
WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, ~(1 << bank) &
RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
}
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