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)
70 spin_lock_irqsave(&dev3.lock, flags);
72 data = *(volatile unsigned *) (IDT434_REG_BASE + reg_offs);
73 for (i = 0; i != len; ++i) {
75 data |= (1 << (i + bit));
77 data &= ~(1 << (i + bit));
79 writel(data, (IDT434_REG_BASE + reg_offs));
81 spin_unlock_irqrestore(&dev3.lock, flags);
83 EXPORT_SYMBOL(set_434_reg);
85 unsigned get_434_reg(unsigned reg_offs)
87 return readl(IDT434_REG_BASE + reg_offs);
89 EXPORT_SYMBOL(get_434_reg);
91 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
95 spin_lock_irqsave(&dev3.lock, flags);
97 dev3.state = (dev3.state | or_mask) & ~nand_mask;
98 writel(dev3.state, &dev3.base);
100 spin_unlock_irqrestore(&dev3.lock, flags);
102 EXPORT_SYMBOL(set_latch_u5);
104 unsigned char get_latch_u5(void)
108 EXPORT_SYMBOL(get_latch_u5);
110 int rb532_gpio_get_value(unsigned gpio)
112 return readl(&rb532_gpio_reg0->gpiod) & (1 << gpio);
114 EXPORT_SYMBOL(rb532_gpio_get_value);
116 void rb532_gpio_set_value(unsigned gpio, int value)
120 tmp = readl(&rb532_gpio_reg0->gpiod) & ~(1 << gpio);
124 writel(tmp, (void *)&rb532_gpio_reg0->gpiod);
126 EXPORT_SYMBOL(rb532_gpio_set_value);
128 int rb532_gpio_direction_input(unsigned gpio)
130 writel(readl(&rb532_gpio_reg0->gpiocfg) & ~(1 << gpio),
131 (void *)&rb532_gpio_reg0->gpiocfg);
135 EXPORT_SYMBOL(rb532_gpio_direction_input);
137 int rb532_gpio_direction_output(unsigned gpio, int value)
139 gpio_set_value(gpio, value);
140 writel(readl(&rb532_gpio_reg0->gpiocfg) | (1 << gpio),
141 (void *)&rb532_gpio_reg0->gpiocfg);
145 EXPORT_SYMBOL(rb532_gpio_direction_output);
147 void rb532_gpio_set_int_level(unsigned gpio, int value)
151 tmp = readl(&rb532_gpio_reg0->gpioilevel) & ~(1 << gpio);
154 writel(tmp, (void *)&rb532_gpio_reg0->gpioilevel);
156 EXPORT_SYMBOL(rb532_gpio_set_int_level);
158 int rb532_gpio_get_int_level(unsigned gpio)
160 return readl(&rb532_gpio_reg0->gpioilevel) & (1 << gpio);
162 EXPORT_SYMBOL(rb532_gpio_get_int_level);
164 void rb532_gpio_set_int_status(unsigned gpio, int value)
168 tmp = readl(&rb532_gpio_reg0->gpioistat);
171 writel(tmp, (void *)&rb532_gpio_reg0->gpioistat);
173 EXPORT_SYMBOL(rb532_gpio_set_int_status);
175 int rb532_gpio_get_int_status(unsigned gpio)
177 return readl(&rb532_gpio_reg0->gpioistat) & (1 << gpio);
179 EXPORT_SYMBOL(rb532_gpio_get_int_status);
181 void rb532_gpio_set_func(unsigned gpio, int value)
185 tmp = readl(&rb532_gpio_reg0->gpiofunc);
188 writel(tmp, (void *)&rb532_gpio_reg0->gpiofunc);
190 EXPORT_SYMBOL(rb532_gpio_set_func);
192 int rb532_gpio_get_func(unsigned gpio)
194 return readl(&rb532_gpio_reg0->gpiofunc) & (1 << gpio);
196 EXPORT_SYMBOL(rb532_gpio_get_func);
198 int __init rb532_gpio_init(void)
200 rb532_gpio_reg0 = ioremap_nocache(rb532_gpio_reg0_res[0].start,
201 rb532_gpio_reg0_res[0].end -
202 rb532_gpio_reg0_res[0].start);
204 if (!rb532_gpio_reg0) {
205 printk(KERN_ERR "rb532: cannot remap GPIO register 0\n");
209 dev3.base = ioremap_nocache(rb532_dev3_ctl_res[0].start,
210 rb532_dev3_ctl_res[0].end -
211 rb532_dev3_ctl_res[0].start);
214 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
220 arch_initcall(rb532_gpio_init);