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);