ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / arch / mips / au1000 / common / gpio.c
blobb485d94ce8a5055d4e28b35f8dec1c7fc3b2af9e
1 /*
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.
25 * Notes :
26 * au1000 SoC have only one GPIO line : GPIO1
27 * others have a second one : GPIO2
30 #include <linux/module.h>
32 #include <asm/mach-au1x00/au1000.h>
33 #include <asm/gpio.h>
35 #define gpio1 sys
36 #if !defined(CONFIG_SOC_AU1000)
38 static struct au1x00_gpio2 *const gpio2 = (struct au1x00_gpio2 *) GPIO2_BASE;
39 #define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
41 static int au1xxx_gpio2_read(unsigned gpio)
43 gpio -= AU1XXX_GPIO_BASE;
44 return ((gpio2->pinstate >> gpio) & 0x01);
47 static void au1xxx_gpio2_write(unsigned gpio, int value)
49 gpio -= AU1XXX_GPIO_BASE;
51 gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | (value << gpio);
54 static int au1xxx_gpio2_direction_input(unsigned gpio)
56 gpio -= AU1XXX_GPIO_BASE;
57 gpio2->dir &= ~(0x01 << gpio);
58 return 0;
61 static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
63 gpio -= AU1XXX_GPIO_BASE;
64 gpio2->dir = (0x01 << gpio) | (value << gpio);
65 return 0;
68 #endif /* !defined(CONFIG_SOC_AU1000) */
70 static int au1xxx_gpio1_read(unsigned gpio)
72 return (gpio1->pinstaterd >> gpio) & 0x01;
75 static void au1xxx_gpio1_write(unsigned gpio, int value)
77 if (value)
78 gpio1->outputset = (0x01 << gpio);
79 else
80 /* Output a zero */
81 gpio1->outputclr = (0x01 << gpio);
84 static int au1xxx_gpio1_direction_input(unsigned gpio)
86 gpio1->pininputen = (0x01 << gpio);
87 return 0;
90 static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
92 gpio1->trioutclr = (0x01 & gpio);
93 return 0;
96 int au1xxx_gpio_get_value(unsigned gpio)
98 if (gpio >= AU1XXX_GPIO_BASE)
99 #if defined(CONFIG_SOC_AU1000)
100 return 0;
101 #else
102 return au1xxx_gpio2_read(gpio);
103 #endif
104 else
105 return au1xxx_gpio1_read(gpio);
107 EXPORT_SYMBOL(au1xxx_gpio_get_value);
109 void au1xxx_gpio_set_value(unsigned gpio, int value)
111 if (gpio >= AU1XXX_GPIO_BASE)
112 #if defined(CONFIG_SOC_AU1000)
114 #else
115 au1xxx_gpio2_write(gpio, value);
116 #endif
117 else
118 au1xxx_gpio1_write(gpio, value);
120 EXPORT_SYMBOL(au1xxx_gpio_set_value);
122 int au1xxx_gpio_direction_input(unsigned gpio)
124 if (gpio >= AU1XXX_GPIO_BASE)
125 #if defined(CONFIG_SOC_AU1000)
126 return -ENODEV;
127 #else
128 return au1xxx_gpio2_direction_input(gpio);
129 #endif
131 return au1xxx_gpio1_direction_input(gpio);
133 EXPORT_SYMBOL(au1xxx_gpio_direction_input);
135 int au1xxx_gpio_direction_output(unsigned gpio, int value)
137 if (gpio >= AU1XXX_GPIO_BASE)
138 #if defined(CONFIG_SOC_AU1000)
139 return -ENODEV;
140 #else
141 return au1xxx_gpio2_direction_output(gpio, value);
142 #endif
144 return au1xxx_gpio1_direction_output(gpio, value);
146 EXPORT_SYMBOL(au1xxx_gpio_direction_output);