/* * Miscellaneous functions for IDT EB434 board * * Copyright 2004 IDT Inc. (rischelp@idt.com) * Copyright 2006 Phil Sutter <n0-1@freewrt.org> * Copyright 2007 Florian Fainelli <florian@openwrt.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/kernel.h> #include <linux/gpio.h> #include <linux/init.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/spinlock.h> #include <linux/io.h> #include <linux/platform_device.h> #include <asm/addrspace.h> #include <asm/mach-rc32434/rb.h> struct rb532_gpio_reg __iomem *rb532_gpio_reg0; EXPORT_SYMBOL(rb532_gpio_reg0); struct mpmc_device dev3; static struct resource rb532_gpio_reg0_res[] = { { .name = "gpio_reg0", .start = (u32)(IDT434_REG_BASE + GPIOBASE), .end = (u32)(IDT434_REG_BASE + GPIOBASE + sizeof(struct rb532_gpio_reg)), .flags = IORESOURCE_MEM, } }; static struct resource rb532_dev3_ctl_res[] = { { .name = "dev3_ctl", .start = (u32)(IDT434_REG_BASE + DEV3BASE), .end = (u32)(IDT434_REG_BASE + DEV3BASE + sizeof(struct dev_reg)), .flags = IORESOURCE_MEM, } }; void set_434_reg(unsigned reg_offs, unsigned bit, unsigned len, unsigned val) { unsigned long flags; unsigned data; unsigned i = 0; spin_lock_irqsave(&dev3.lock, flags); data = *(volatile unsigned *) (IDT434_REG_BASE + reg_offs); for (i = 0; i != len; ++i) { if (val & (1 << i)) data |= (1 << (i + bit)); else data &= ~(1 << (i + bit)); } writel(data, (IDT434_REG_BASE + reg_offs)); spin_unlock_irqrestore(&dev3.lock, flags); } EXPORT_SYMBOL(set_434_reg); unsigned get_434_reg(unsigned reg_offs) { return readl(IDT434_REG_BASE + reg_offs); } EXPORT_SYMBOL(get_434_reg); void set_latch_u5(unsigned char or_mask, unsigned char nand_mask) { unsigned long flags; spin_lock_irqsave(&dev3.lock, flags); dev3.state = (dev3.state | or_mask) & ~nand_mask; writel(dev3.state, &dev3.base); spin_unlock_irqrestore(&dev3.lock, flags); } EXPORT_SYMBOL(set_latch_u5); unsigned char get_latch_u5(void) { return dev3.state; } EXPORT_SYMBOL(get_latch_u5); int rb532_gpio_get_value(unsigned gpio) { return readl(&rb532_gpio_reg0->gpiod) & (1 << gpio); } EXPORT_SYMBOL(rb532_gpio_get_value); void rb532_gpio_set_value(unsigned gpio, int value) { unsigned tmp; tmp = readl(&rb532_gpio_reg0->gpiod) & ~(1 << gpio); if (value) tmp |= 1 << gpio; writel(tmp, (void *)&rb532_gpio_reg0->gpiod); } EXPORT_SYMBOL(rb532_gpio_set_value); int rb532_gpio_direction_input(unsigned gpio) { writel(readl(&rb532_gpio_reg0->gpiocfg) & ~(1 << gpio), (void *)&rb532_gpio_reg0->gpiocfg); return 0; } EXPORT_SYMBOL(rb532_gpio_direction_input); int rb532_gpio_direction_output(unsigned gpio, int value) { gpio_set_value(gpio, value); writel(readl(&rb532_gpio_reg0->gpiocfg) | (1 << gpio), (void *)&rb532_gpio_reg0->gpiocfg); return 0; } EXPORT_SYMBOL(rb532_gpio_direction_output); void rb532_gpio_set_int_level(unsigned gpio, int value) { unsigned tmp; tmp = readl(&rb532_gpio_reg0->gpioilevel) & ~(1 << gpio); if (value) tmp |= 1 << gpio; writel(tmp, (void *)&rb532_gpio_reg0->gpioilevel); } EXPORT_SYMBOL(rb532_gpio_set_int_level); int rb532_gpio_get_int_level(unsigned gpio) { return readl(&rb532_gpio_reg0->gpioilevel) & (1 << gpio); } EXPORT_SYMBOL(rb532_gpio_get_int_level); void rb532_gpio_set_int_status(unsigned gpio, int value) { unsigned tmp; tmp = readl(&rb532_gpio_reg0->gpioistat); if (value) tmp |= 1 << gpio; writel(tmp, (void *)&rb532_gpio_reg0->gpioistat); } EXPORT_SYMBOL(rb532_gpio_set_int_status); int rb532_gpio_get_int_status(unsigned gpio) { return readl(&rb532_gpio_reg0->gpioistat) & (1 << gpio); } EXPORT_SYMBOL(rb532_gpio_get_int_status); void rb532_gpio_set_func(unsigned gpio, int value) { unsigned tmp; tmp = readl(&rb532_gpio_reg0->gpiofunc); if (value) tmp |= 1 << gpio; writel(tmp, (void *)&rb532_gpio_reg0->gpiofunc); } EXPORT_SYMBOL(rb532_gpio_set_func); int rb532_gpio_get_func(unsigned gpio) { return readl(&rb532_gpio_reg0->gpiofunc) & (1 << gpio); } EXPORT_SYMBOL(rb532_gpio_get_func); int __init rb532_gpio_init(void) { rb532_gpio_reg0 = ioremap_nocache(rb532_gpio_reg0_res[0].start, rb532_gpio_reg0_res[0].end - rb532_gpio_reg0_res[0].start); if (!rb532_gpio_reg0) { printk(KERN_ERR "rb532: cannot remap GPIO register 0\n"); return -ENXIO; } dev3.base = ioremap_nocache(rb532_dev3_ctl_res[0].start, rb532_dev3_ctl_res[0].end - rb532_dev3_ctl_res[0].start); if (!dev3.base) { printk(KERN_ERR "rb532: cannot remap device controller 3\n"); return -ENXIO; } return 0; } arch_initcall(rb532_gpio_init);