153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
/* $NetBSD: netwalker_spi.c,v 1.1 2014/03/29 12:00:27 hkenken Exp $ */
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/*-
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* Copyright (c) 2009 Genetec Corporation. All rights reserved.
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* Written by Hashimoto Kenichi for Genetec Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: netwalker_spi.c,v 1.1 2014/03/29 12:00:27 hkenken Exp $");
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#include "opt_imxspi.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <arm/imx/imx51reg.h>
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#include <arm/imx/imx51var.h>
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#include <arm/imx/imx51_ccmvar.h>
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#include <arm/imx/imx51_ccmreg.h>
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#include <arm/imx/imx51_iomuxreg.h>
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#include <arm/imx/imxgpiovar.h>
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#include <arm/imx/imxspivar.h>
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struct imx51spi_softc {
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struct imxspi_softc sc_spi;
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struct spi_chipset_tag sc_tag;
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};
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CFATTACH_DECL_NEW(spi_netwalker, sizeof(struct imx51spi_softc),
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imxspi_match, imxspi_attach, NULL, NULL);
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static int
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imxspi_cs_enable(void *arg, int slave)
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{
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switch (slave) {
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case 0:
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gpio_data_write(GPIO_NO(4, 24), 0);
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gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_OUT);
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break;
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case 1:
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gpio_data_write(GPIO_NO(4, 25), 0);
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gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_OUT);
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break;
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case 2:
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gpio_data_write(GPIO_NO(3, 0), 0);
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gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_OUT);
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break;
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}
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return 0;
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}
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static int
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imxspi_cs_disable(void *arg, int slave)
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{
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switch (slave) {
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case 0:
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gpio_data_write(GPIO_NO(4, 24), 1);
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gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_IN);
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break;
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case 1:
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gpio_data_write(GPIO_NO(4, 25), 1);
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gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_IN);
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break;
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case 2:
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gpio_data_write(GPIO_NO(3, 0), 1);
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gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_IN);
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break;
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}
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return 0;
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}
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int
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imxspi_match(device_t parent, cfdata_t cf, void *aux)
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{
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if (strcmp(cf->cf_name, "imxspi") == 0)
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return 1;
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if (cf->cf_unit != 0)
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return 1;
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return 0;
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}
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void
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imxspi_attach(device_t parent, device_t self, void *aux)
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{
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struct imx51spi_softc *sc = device_private(self);
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struct axi_attach_args *aa = aux;
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struct imxspi_attach_args saa;
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int cf_flags = device_cfdata(self)->cf_flags;
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sc->sc_tag.cookie = sc;
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if (device_cfdata(self)->cf_unit == 0) {
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/* CS 0 GPIO setting */
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gpio_data_write(GPIO_NO(4, 24), 1);
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gpio_set_direction(GPIO_NO(4, 24), GPIO_DIR_IN);
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/* CS 1 GPIO setting */
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gpio_data_write(GPIO_NO(4, 25), 1);
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gpio_set_direction(GPIO_NO(4, 25), GPIO_DIR_IN);
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/* CS 2 */
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/* OJ6SH-T25 Shutdown */
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gpio_data_write(GPIO_NO(3, 14), 0);
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gpio_set_direction(GPIO_NO(3, 14), GPIO_DIR_OUT);
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/* CS 2 GPIO setting */
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gpio_data_write(GPIO_NO(3, 0), 1);
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gpio_set_direction(GPIO_NO(3, 0), GPIO_DIR_IN);
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sc->sc_tag.spi_cs_enable = imxspi_cs_enable;
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sc->sc_tag.spi_cs_disable = imxspi_cs_disable;
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}
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saa.saa_iot = aa->aa_iot;
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saa.saa_addr = aa->aa_addr;
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saa.saa_size = aa->aa_size;
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saa.saa_irq = aa->aa_irq;
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saa.saa_enhanced = cf_flags;
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saa.saa_nslaves = IMXSPINSLAVES;
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saa.saa_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT);
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saa.saa_tag = &sc->sc_tag;
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sc->sc_spi.sc_dev = self;
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imxspi_attach_common(parent, &sc->sc_spi, &saa);
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}
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