Kernel gpio/2 routines that will be used by some drivers.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 140 insertions, 1 deletions

diff --git a/arch/mips/au1000/common/Makefile b/arch/mips/au1000/common/Makefile
index 594b75e5e080..a1edfd1f643c 100644
--- a/arch/mips/au1000/common/Makefile
+++ b/arch/mips/au1000/common/Makefile
@@ -8,7 +8,7 @@
 
 obj-y += prom.o int-handler.o irq.o puts.o time.o reset.o \
         au1xxx_irqmap.o clocks.o platform.o power.o setup.o \
-        sleeper.o cputable.o dma.o dbdma.o
+        sleeper.o cputable.o dma.o dbdma.o gpio.o
 
 obj-$(CONFIG_AU1X00_USB_DEVICE) += usbdev.o
 obj-$(CONFIG_KGDB)              += dbg_io.o
diff --git a/arch/mips/au1000/common/gpio.c b/arch/mips/au1000/common/gpio.c
new file mode 100644
index 000000000000..5f5915b83142
--- /dev/null
+++ b/arch/mips/au1000/common/gpio.c
@@ -0,0 +1,119 @@
+/*
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``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 AUTHOR  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.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <au1000.h>
+#include <au1xxx_gpio.h>
+
+#define gpio1 sys
+#if !defined(CONFIG_SOC_AU1000)
+static AU1X00_GPIO2 * const gpio2 = (AU1X00_GPIO2 *)GPIO2_BASE;
+
+#define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
+
+int au1xxx_gpio2_read(int signal)
+{
+        signal -= 200;
+/*      gpio2->dir &= ~(0x01 << signal);                                                //Set GPIO to input */
+        return ((gpio2->pinstate >> signal) & 0x01);
+}
+
+void au1xxx_gpio2_write(int signal, int value)
+{
+        signal -= 200;
+
+        gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << signal) |
+                (value << signal);
+}
+
+void au1xxx_gpio2_tristate(int signal)
+{
+        signal -= 200;
+        gpio2->dir &= ~(0x01 << signal);        /* Set GPIO to input */
+}
+#endif
+
+int au1xxx_gpio1_read(int signal)
+{
+/*      gpio1->trioutclr |= (0x01 << signal); */
+        return ((gpio1->pinstaterd >> signal) & 0x01);
+}
+
+void au1xxx_gpio1_write(int signal, int value)
+{
+        if(value)
+                gpio1->outputset = (0x01 << signal);
+        else
+                gpio1->outputclr = (0x01 << signal);    /* Output a Zero */
+}
+
+void au1xxx_gpio1_tristate(int signal)
+{
+        gpio1->trioutclr = (0x01 << signal);            /* Tristate signal */
+}
+
+
+int au1xxx_gpio_read(int signal)
+{
+        if(signal >= 200)
+#if defined(CONFIG_SOC_AU1000)
+                return 0;
+#else
+                return au1xxx_gpio2_read(signal);
+#endif
+        else
+                return au1xxx_gpio1_read(signal);
+}
+
+void au1xxx_gpio_write(int signal, int value)
+{
+        if(signal >= 200)
+#if defined(CONFIG_SOC_AU1000)
+                ;
+#else
+                au1xxx_gpio2_write(signal, value);
+#endif
+        else
+                au1xxx_gpio1_write(signal, value);
+}
+
+void au1xxx_gpio_tristate(int signal)
+{
+        if(signal >= 200)
+#if defined(CONFIG_SOC_AU1000)
+                ;
+#else
+                au1xxx_gpio2_tristate(signal);
+#endif
+        else
+                au1xxx_gpio1_tristate(signal);
+}
+
+void au1xxx_gpio1_set_inputs(void)
+{
+        gpio1->pininputen = 0;
+}
+
+EXPORT_SYMBOL(au1xxx_gpio1_set_inputs);
+EXPORT_SYMBOL(au1xxx_gpio_tristate);
+EXPORT_SYMBOL(au1xxx_gpio_write);
+EXPORT_SYMBOL(au1xxx_gpio_read);
diff --git a/include/asm-mips/mach-au1x00/au1xxx_gpio.h b/include/asm-mips/mach-au1x00/au1xxx_gpio.h
new file mode 100644
index 000000000000..27911e054ffc
--- /dev/null
+++ b/include/asm-mips/mach-au1x00/au1xxx_gpio.h
@@ -0,0 +1,20 @@
+#ifndef __AU1XXX_GPIO_H
+#define __AU1XXX_GPIO_H
+
+void au1xxx_gpio1_set_inputs(void);
+void au1xxx_gpio_tristate(int signal);
+void au1xxx_gpio_write(int signal, int value);
+int  au1xxx_gpio_read(int signal);
+
+typedef volatile struct
+{
+        u32 dir;
+        u32 reserved;
+        u32 output;
+        u32 pinstate;
+        u32 inten;
+        u32 enable;
+
+} AU1X00_GPIO2;
+
+#endif //__AU1XXX_GPIO_H