120 lines
3 KiB
C
120 lines
3 KiB
C
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <au1000.h>
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#include <au1xxx_gpio.h>
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#define gpio1 sys
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#if !defined(CONFIG_SOC_AU1000)
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static AU1X00_GPIO2 * const gpio2 = (AU1X00_GPIO2 *)GPIO2_BASE;
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#define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
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int au1xxx_gpio2_read(int signal)
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{
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signal -= 200;
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/* gpio2->dir &= ~(0x01 << signal); //Set GPIO to input */
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return ((gpio2->pinstate >> signal) & 0x01);
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}
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void au1xxx_gpio2_write(int signal, int value)
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{
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signal -= 200;
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gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << signal) |
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(value << signal);
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}
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void au1xxx_gpio2_tristate(int signal)
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{
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signal -= 200;
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gpio2->dir &= ~(0x01 << signal); /* Set GPIO to input */
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}
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#endif
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int au1xxx_gpio1_read(int signal)
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{
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/* gpio1->trioutclr |= (0x01 << signal); */
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return ((gpio1->pinstaterd >> signal) & 0x01);
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}
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void au1xxx_gpio1_write(int signal, int value)
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{
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if(value)
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gpio1->outputset = (0x01 << signal);
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else
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gpio1->outputclr = (0x01 << signal); /* Output a Zero */
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}
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void au1xxx_gpio1_tristate(int signal)
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{
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gpio1->trioutclr = (0x01 << signal); /* Tristate signal */
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}
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int au1xxx_gpio_read(int signal)
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{
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if(signal >= 200)
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#if defined(CONFIG_SOC_AU1000)
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return 0;
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#else
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return au1xxx_gpio2_read(signal);
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#endif
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else
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return au1xxx_gpio1_read(signal);
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}
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void au1xxx_gpio_write(int signal, int value)
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{
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if(signal >= 200)
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#if defined(CONFIG_SOC_AU1000)
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;
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#else
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au1xxx_gpio2_write(signal, value);
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#endif
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else
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au1xxx_gpio1_write(signal, value);
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}
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void au1xxx_gpio_tristate(int signal)
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{
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if(signal >= 200)
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#if defined(CONFIG_SOC_AU1000)
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;
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#else
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au1xxx_gpio2_tristate(signal);
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#endif
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else
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au1xxx_gpio1_tristate(signal);
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}
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void au1xxx_gpio1_set_inputs(void)
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{
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gpio1->pininputen = 0;
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}
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EXPORT_SYMBOL(au1xxx_gpio1_set_inputs);
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EXPORT_SYMBOL(au1xxx_gpio_tristate);
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EXPORT_SYMBOL(au1xxx_gpio_write);
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EXPORT_SYMBOL(au1xxx_gpio_read);
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