2 * arch/arm/mach-mxc/generic.c
5 * Created: april 20th, 2004
6 * Copyright: Synertronixx GmbH
8 * Common code for i.MX machines
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/string.h>
31 #include <linux/gpio.h>
33 #include <asm/hardware.h>
34 #include <asm/mach/map.h>
35 #include <asm/arch/iomux-mx1-mx2.h>
37 void mxc_gpio_mode(int gpio_mode)
39 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
40 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
41 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
45 tmp = __raw_readl(VA_GPIO_BASE + MXC_PUEN(port));
46 if (gpio_mode & GPIO_PUEN)
50 __raw_writel(tmp, VA_GPIO_BASE + MXC_PUEN(port));
53 tmp = __raw_readl(VA_GPIO_BASE + MXC_DDIR(port));
54 if (gpio_mode & GPIO_OUT)
58 __raw_writel(tmp, VA_GPIO_BASE + MXC_DDIR(port));
60 /* Primary / alternate function */
61 tmp = __raw_readl(VA_GPIO_BASE + MXC_GPR(port));
62 if (gpio_mode & GPIO_AF)
66 __raw_writel(tmp, VA_GPIO_BASE + MXC_GPR(port));
69 tmp = __raw_readl(VA_GPIO_BASE + MXC_GIUS(port));
70 if (gpio_mode & (GPIO_PF | GPIO_AF))
74 __raw_writel(tmp, VA_GPIO_BASE + MXC_GIUS(port));
77 tmp = __raw_readl(VA_GPIO_BASE + MXC_OCR1(port));
78 tmp &= ~(3 << (pin * 2));
79 tmp |= (ocr << (pin * 2));
80 __raw_writel(tmp, VA_GPIO_BASE + MXC_OCR1(port));
82 tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFA1(port));
83 tmp &= ~(3 << (pin * 2));
84 tmp |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
85 __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFA1(port));
87 tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFB1(port));
88 tmp &= ~(3 << (pin * 2));
89 tmp |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
90 __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFB1(port));
94 tmp = __raw_readl(VA_GPIO_BASE + MXC_OCR2(port));
95 tmp &= ~(3 << (pin * 2));
96 tmp |= (ocr << (pin * 2));
97 __raw_writel(tmp, VA_GPIO_BASE + MXC_OCR2(port));
99 tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFA2(port));
100 tmp &= ~(3 << (pin * 2));
101 tmp |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
102 __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFA2(port));
104 tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFB2(port));
105 tmp &= ~(3 << (pin * 2));
106 tmp |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
107 __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFB2(port));
110 EXPORT_SYMBOL(mxc_gpio_mode);
112 int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
113 int alloc_mode, const char *label)
115 const int *p = pin_list;
120 for (i = 0; i < count; i++) {
121 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
122 mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK);
124 if (gpio >= (GPIO_PORT_MAX + 1) * 32)
127 if (alloc_mode & MXC_GPIO_ALLOC_MODE_RELEASE)
129 else if (!(alloc_mode & MXC_GPIO_ALLOC_MODE_NO_ALLOC))
130 if (gpio_request(gpio, label)
131 && !(alloc_mode & MXC_GPIO_ALLOC_MODE_TRY_ALLOC))
134 if (!(alloc_mode & (MXC_GPIO_ALLOC_MODE_ALLOC_ONLY |
135 MXC_GPIO_ALLOC_MODE_RELEASE)))
136 mxc_gpio_mode(gpio | mode);
143 if (alloc_mode & (MXC_GPIO_ALLOC_MODE_NO_ALLOC |
144 MXC_GPIO_ALLOC_MODE_TRY_ALLOC))
147 while (p != pin_list) {
149 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
155 EXPORT_SYMBOL(mxc_gpio_setup_multiple_pins);