2 * Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
3 * Architecture specific GPIO support
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
11 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
13 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
14 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
15 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
16 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
17 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
18 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
19 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 * au1000 SoC have only one GPIO line : GPIO1
27 * others have a second one : GPIO2
30 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/module.h>
35 #include <asm/addrspace.h>
37 #include <asm/mach-au1x00/au1000.h>
41 #if !defined(CONFIG_SOC_AU1000)
43 static struct au1x00_gpio2
*const gpio2
= (struct au1x00_gpio2
*) GPIO2_BASE
;
44 #define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
46 static int au1xxx_gpio2_read(unsigned gpio
)
48 gpio
-= AU1XXX_GPIO_BASE
;
49 return ((gpio2
->pinstate
>> gpio
) & 0x01);
52 static void au1xxx_gpio2_write(unsigned gpio
, int value
)
54 gpio
-= AU1XXX_GPIO_BASE
;
56 gpio2
->output
= (GPIO2_OUTPUT_ENABLE_MASK
<< gpio
) | (value
<< gpio
);
59 static int au1xxx_gpio2_direction_input(unsigned gpio
)
61 gpio
-= AU1XXX_GPIO_BASE
;
62 gpio2
->dir
&= ~(0x01 << gpio
);
66 static int au1xxx_gpio2_direction_output(unsigned gpio
, int value
)
68 gpio
-= AU1XXX_GPIO_BASE
;
69 gpio2
->dir
= (0x01 << gpio
) | (value
<< gpio
);
73 #endif /* !defined(CONFIG_SOC_AU1000) */
75 static int au1xxx_gpio1_read(unsigned gpio
)
77 return ((gpio1
->pinstaterd
>> gpio
) & 0x01);
80 static void au1xxx_gpio1_write(unsigned gpio
, int value
)
83 gpio1
->outputset
= (0x01 << gpio
);
86 gpio1
->outputclr
= (0x01 << gpio
);
89 static int au1xxx_gpio1_direction_input(unsigned gpio
)
91 gpio1
->pininputen
= (0x01 << gpio
);
95 static int au1xxx_gpio1_direction_output(unsigned gpio
, int value
)
97 gpio1
->trioutclr
= (0x01 & gpio
);
101 int au1xxx_gpio_get_value(unsigned gpio
)
103 if (gpio
>= AU1XXX_GPIO_BASE
)
104 #if defined(CONFIG_SOC_AU1000)
107 return au1xxx_gpio2_read(gpio
);
110 return au1xxx_gpio1_read(gpio
);
113 EXPORT_SYMBOL(au1xxx_gpio_get_value
);
115 void au1xxx_gpio_set_value(unsigned gpio
, int value
)
117 if (gpio
>= AU1XXX_GPIO_BASE
)
118 #if defined(CONFIG_SOC_AU1000)
121 au1xxx_gpio2_write(gpio
, value
);
124 au1xxx_gpio1_write(gpio
, value
);
127 EXPORT_SYMBOL(au1xxx_gpio_set_value
);
129 int au1xxx_gpio_direction_input(unsigned gpio
)
131 if (gpio
>= AU1XXX_GPIO_BASE
)
132 #if defined(CONFIG_SOC_AU1000)
135 return au1xxx_gpio2_direction_input(gpio
);
138 return au1xxx_gpio1_direction_input(gpio
);
141 EXPORT_SYMBOL(au1xxx_gpio_direction_input
);
143 int au1xxx_gpio_direction_output(unsigned gpio
, int value
)
145 if (gpio
>= AU1XXX_GPIO_BASE
)
146 #if defined(CONFIG_SOC_AU1000)
149 return au1xxx_gpio2_direction_output(gpio
, value
);
152 return au1xxx_gpio1_direction_output(gpio
, value
);
155 EXPORT_SYMBOL(au1xxx_gpio_direction_output
);