2 * Miscellaneous functions for IDT EB434 board
4 * Copyright 2004 IDT Inc. (rischelp@idt.com)
5 * Copyright 2006 Phil Sutter <n0-1@freewrt.org>
6 * Copyright 2007 Florian Fainelli <florian@openwrt.org>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <linux/kernel.h>
30 #include <linux/gpio.h>
31 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/spinlock.h>
36 #include <linux/platform_device.h>
38 #include <asm/addrspace.h>
40 #include <asm/mach-rc32434/rb.h>
42 struct rb532_gpio_reg __iomem *rb532_gpio_reg0;
43 EXPORT_SYMBOL(rb532_gpio_reg0);
45 struct mpmc_device dev3;
47 static struct resource rb532_gpio_reg0_res[] = {
50 .start = (u32)(IDT434_REG_BASE + GPIOBASE),
51 .end = (u32)(IDT434_REG_BASE + GPIOBASE + sizeof(struct rb532_gpio_reg)),
52 .flags = IORESOURCE_MEM,
56 static struct resource rb532_dev3_ctl_res[] = {
59 .start = (u32)(IDT434_REG_BASE + DEV3BASE),
60 .end = (u32)(IDT434_REG_BASE + DEV3BASE + sizeof(struct dev_reg)),
61 .flags = IORESOURCE_MEM,
65 void set_434_reg(unsigned reg_offs, unsigned bit, unsigned len, unsigned val)
71 spin_lock_irqsave(&dev3.lock, flags);
73 data = *(volatile unsigned *) (IDT434_REG_BASE + reg_offs);
74 for (i = 0; i != len; ++i) {
76 data |= (1 << (i + bit));
78 data &= ~(1 << (i + bit));
80 writel(data, (IDT434_REG_BASE + reg_offs));
82 spin_unlock_irqrestore(&dev3.lock, flags);
84 EXPORT_SYMBOL(set_434_reg);
86 unsigned get_434_reg(unsigned reg_offs)
88 return readl(IDT434_REG_BASE + reg_offs);
90 EXPORT_SYMBOL(get_434_reg);
92 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
96 spin_lock_irqsave(&dev3.lock, flags);
98 dev3.state = (dev3.state | or_mask) & ~nand_mask;
99 writel(dev3.state, &dev3.base);
101 spin_unlock_irqrestore(&dev3.lock, flags);
103 EXPORT_SYMBOL(set_latch_u5);
105 unsigned char get_latch_u5(void)
109 EXPORT_SYMBOL(get_latch_u5);
111 int rb532_gpio_get_value(unsigned gpio)
113 return readl(&rb532_gpio_reg0->gpiod) & (1 << gpio);
115 EXPORT_SYMBOL(rb532_gpio_get_value);
117 void rb532_gpio_set_value(unsigned gpio, int value)
121 tmp = readl(&rb532_gpio_reg0->gpiod) & ~(1 << gpio);
125 writel(tmp, (void *)&rb532_gpio_reg0->gpiod);
127 EXPORT_SYMBOL(rb532_gpio_set_value);
129 int rb532_gpio_direction_input(unsigned gpio)
131 writel(readl(&rb532_gpio_reg0->gpiocfg) & ~(1 << gpio),
132 (void *)&rb532_gpio_reg0->gpiocfg);
136 EXPORT_SYMBOL(rb532_gpio_direction_input);
138 int rb532_gpio_direction_output(unsigned gpio, int value)
140 gpio_set_value(gpio, value);
141 writel(readl(&rb532_gpio_reg0->gpiocfg) | (1 << gpio),
142 (void *)&rb532_gpio_reg0->gpiocfg);
146 EXPORT_SYMBOL(rb532_gpio_direction_output);
148 void rb532_gpio_set_int_level(unsigned gpio, int value)
152 tmp = readl(&rb532_gpio_reg0->gpioilevel) & ~(1 << gpio);
155 writel(tmp, (void *)&rb532_gpio_reg0->gpioilevel);
157 EXPORT_SYMBOL(rb532_gpio_set_int_level);
159 int rb532_gpio_get_int_level(unsigned gpio)
161 return readl(&rb532_gpio_reg0->gpioilevel) & (1 << gpio);
163 EXPORT_SYMBOL(rb532_gpio_get_int_level);
165 void rb532_gpio_set_int_status(unsigned gpio, int value)
169 tmp = readl(&rb532_gpio_reg0->gpioistat);
172 writel(tmp, (void *)&rb532_gpio_reg0->gpioistat);
174 EXPORT_SYMBOL(rb532_gpio_set_int_status);
176 int rb532_gpio_get_int_status(unsigned gpio)
178 return readl(&rb532_gpio_reg0->gpioistat) & (1 << gpio);
180 EXPORT_SYMBOL(rb532_gpio_get_int_status);
182 void rb532_gpio_set_func(unsigned gpio, int value)
186 tmp = readl(&rb532_gpio_reg0->gpiofunc);
189 writel(tmp, (void *)&rb532_gpio_reg0->gpiofunc);
191 EXPORT_SYMBOL(rb532_gpio_set_func);
193 int rb532_gpio_get_func(unsigned gpio)
195 return readl(&rb532_gpio_reg0->gpiofunc) & (1 << gpio);
197 EXPORT_SYMBOL(rb532_gpio_get_func);
199 int __init rb532_gpio_init(void)
201 rb532_gpio_reg0 = ioremap_nocache(rb532_gpio_reg0_res[0].start,
202 rb532_gpio_reg0_res[0].end -
203 rb532_gpio_reg0_res[0].start);
205 if (!rb532_gpio_reg0) {
206 printk(KERN_ERR "rb532: cannot remap GPIO register 0\n");
210 dev3.base = ioremap_nocache(rb532_dev3_ctl_res[0].start,
211 rb532_dev3_ctl_res[0].end -
212 rb532_dev3_ctl_res[0].start);
215 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
221 arch_initcall(rb532_gpio_init);