2 * arch/arm/mach-imx/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
25 #include <linux/platform_device.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/string.h>
31 #include <asm/errno.h>
32 #include <mach/hardware.h>
33 #include <mach/imx-regs.h>
35 #include <asm/mach/map.h>
37 #include <mach/gpio.h>
39 unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG];
41 void imx_gpio_mode(int gpio_mode)
43 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
44 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
45 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
49 if(gpio_mode & GPIO_PUEN)
50 PUEN(port) |= (1<<pin);
52 PUEN(port) &= ~(1<<pin);
55 if(gpio_mode & GPIO_OUT)
58 DDIR(port) &= ~(1<<pin);
60 /* Primary / alternate function */
61 if(gpio_mode & GPIO_AF)
62 GPR(port) |= (1<<pin);
64 GPR(port) &= ~(1<<pin);
67 if(gpio_mode & GPIO_GIUS)
68 GIUS(port) |= (1<<pin);
70 GIUS(port) &= ~(1<<pin);
72 /* Output / input configuration */
73 /* FIXME: I'm not very sure about OCR and ICONF, someone
74 * should have a look over it
78 tmp &= ~( 3<<(pin*2));
79 tmp |= (ocr << (pin*2));
82 ICONFA1(port) &= ~( 3<<(pin*2));
83 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
84 ICONFB1(port) &= ~( 3<<(pin*2));
85 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
88 tmp &= ~( 3<<((pin-16)*2));
89 tmp |= (ocr << ((pin-16)*2));
92 ICONFA2(port) &= ~( 3<<((pin-16)*2));
93 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
94 ICONFB2(port) &= ~( 3<<((pin-16)*2));
95 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
99 EXPORT_SYMBOL(imx_gpio_mode);
101 int imx_gpio_request(unsigned gpio, const char *label)
103 if(gpio >= (GPIO_PORT_MAX + 1) * 32) {
104 printk(KERN_ERR "imx_gpio: Attempt to request nonexistent GPIO %d for \"%s\"\n",
105 gpio, label ? label : "?");
109 if(test_and_set_bit(gpio, imx_gpio_alloc_map)) {
110 printk(KERN_ERR "imx_gpio: GPIO %d already used. Allocation for \"%s\" failed\n",
111 gpio, label ? label : "?");
118 EXPORT_SYMBOL(imx_gpio_request);
120 void imx_gpio_free(unsigned gpio)
122 if(gpio >= (GPIO_PORT_MAX + 1) * 32)
125 clear_bit(gpio, imx_gpio_alloc_map);
128 EXPORT_SYMBOL(imx_gpio_free);
130 int imx_gpio_direction_input(unsigned gpio)
132 imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_DR);
136 EXPORT_SYMBOL(imx_gpio_direction_input);
138 int imx_gpio_direction_output(unsigned gpio, int value)
140 imx_gpio_set_value(gpio, value);
141 imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_DR);
145 EXPORT_SYMBOL(imx_gpio_direction_output);
147 int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
148 int alloc_mode, const char *label)
150 const int *p = pin_list;
155 for (i = 0; i < count; i++) {
156 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
157 mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK);
159 if (gpio >= (GPIO_PORT_MAX + 1) * 32)
162 if (alloc_mode & IMX_GPIO_ALLOC_MODE_RELEASE)
164 else if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_NO_ALLOC))
165 if (imx_gpio_request(gpio, label))
166 if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
169 if (!(alloc_mode & (IMX_GPIO_ALLOC_MODE_ALLOC_ONLY |
170 IMX_GPIO_ALLOC_MODE_RELEASE)))
171 imx_gpio_mode(gpio | mode);
178 if(alloc_mode & (IMX_GPIO_ALLOC_MODE_NO_ALLOC |
179 IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
182 while (p != pin_list) {
184 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
191 EXPORT_SYMBOL(imx_gpio_setup_multiple_pins);
193 void __imx_gpio_set_value(unsigned gpio, int value)
195 imx_gpio_set_value_inline(gpio, value);
198 EXPORT_SYMBOL(__imx_gpio_set_value);
200 int imx_gpio_to_irq(unsigned gpio)
202 return IRQ_GPIOA(0) + gpio;
205 EXPORT_SYMBOL(imx_gpio_to_irq);
207 int imx_irq_to_gpio(unsigned irq)
209 if (irq < IRQ_GPIOA(0))
211 return irq - IRQ_GPIOA(0);
214 EXPORT_SYMBOL(imx_irq_to_gpio);
216 static struct resource imx_mmc_resources[] = {
220 .flags = IORESOURCE_MEM,
225 .flags = IORESOURCE_IRQ,
229 static u64 imxmmmc_dmamask = 0xffffffffUL;
231 static struct platform_device imx_mmc_device = {
235 .dma_mask = &imxmmmc_dmamask,
236 .coherent_dma_mask = 0xffffffff,
238 .num_resources = ARRAY_SIZE(imx_mmc_resources),
239 .resource = imx_mmc_resources,
242 void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
244 imx_mmc_device.dev.platform_data = info;
247 static struct platform_device *devices[] __initdata = {
251 static struct map_desc imx_io_desc[] __initdata = {
253 .virtual = IMX_IO_BASE,
254 .pfn = __phys_to_pfn(IMX_IO_PHYS),
255 .length = IMX_IO_SIZE,
263 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
266 static int __init imx_init(void)
268 return platform_add_devices(devices, ARRAY_SIZE(devices));
271 subsys_initcall(imx_init);