1/*- 2 * Copyright (c) 2014 M. Warner Losh. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD$"); 28 29#include <sys/types.h> 30 31#include <arm/at91/at91reg.h> 32#include <arm/at91/at91_smc.h> 33#include <arm/at91/at91sam9260reg.h> 34 35/* 36 * RD4HW()/WR4HW() read and write at91 hardware register space directly. They 37 * serve the same purpose as the RD4()/WR4() idiom you see in many drivers, 38 * except that those translate to bus_space calls, but in this code we need to 39 * access some devices before bus_space is ready to use. Of course for this to 40 * work the appropriate static device mappings need to be made in machdep.c. 41 */ 42static inline uint32_t 43RD4HW(uint32_t devbase, uint32_t regoff) 44{ 45 46 return *(volatile uint32_t *)(AT91_BASE + devbase + regoff); 47} 48 49 50static inline void 51WR4HW(uint32_t devbase, uint32_t regoff, uint32_t val) 52{ 53 54 *(volatile uint32_t *)(AT91_BASE + devbase + regoff) = val; 55} 56 57 58void 59at91_smc_setup(int id, int cs, const struct at91_smc_init *smc) 60{ 61 // Need a generic way to get this address for all SoCs... Assume 9260 for now... 62 uint32_t base = AT91SAM9260_SMC_BASE + SMC_CS_OFF(cs); 63 64 WR4HW(base, SMC_SETUP, SMC_SETUP_NCS_RD_SETUP(smc->ncs_rd_setup) | 65 SMC_SETUP_NRD_SETUP(smc->nrd_setup) | 66 SMC_SETUP_NCS_WR_SETUP(smc->ncs_wr_setup) | 67 SMC_SETUP_NWE_SETUP(smc->nwe_setup)); 68 WR4HW(base, SMC_PULSE, SMC_PULSE_NCS_RD_PULSE(smc->ncs_rd_pulse) | 69 SMC_PULSE_NRD_PULSE(smc->nrd_pulse) | 70 SMC_PULSE_NCS_WR_PULSE(smc->ncs_wr_pulse) | 71 SMC_PULSE_NWE_PULSE(smc->nwe_pulse)); 72 WR4HW(base, SMC_CYCLE, SMC_CYCLE_NRD_CYCLE(smc->nrd_cycle) | 73 SMC_CYCLE_NWE_CYCLE(smc->nwe_cycle)); 74 WR4HW(base, SMC_MODE, smc->mode | SMC_MODE_TDF_CYCLES(smc->tdf_cycles)); 75} 76 77void 78at91_ebi_enable(int bank) 79{ 80 81 WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, (1 << bank) | 82 RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA)); 83} 84 85void 86at91_ebi_disable(int bank) 87{ 88 89 WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, ~(1 << bank) & 90 RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA)); 91} 92