kernel/2.6.29.6-aldebaran-rt/arch/arm/mach-imx/generic.c

   1 /*
   2  *  arch/arm/mach-imx/generic.c
   3  *
   4  *  author: Sascha Hauer
   5  *  Created: april 20th, 2004
   6  *  Copyright: Synertronixx GmbH
   7  *
   8  *  Common code for i.MX machines
   9  *
  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.
  14  *
  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.
  19  *
  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
  23  *
  24  */
  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>
  30
  31 #include <asm/errno.h>
  32 #include <mach/imxfb.h>
  33 #include <mach/hardware.h>
  34 #include <mach/imx-regs.h>
  35
  36 #include <asm/mach/map.h>
  37 #include <mach/mmc.h>
  38 #include <mach/gpio.h>
  39
  40 unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG];
  41
  42 void imx_gpio_mode(int gpio_mode)
  43 {
  44         unsigned int pin = gpio_mode & GPIO_PIN_MASK;
  45         unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
  46         unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
  47         unsigned int tmp;
  48
  49         /* Pullup enable */
  50         if(gpio_mode & GPIO_PUEN)
  51                 PUEN(port) |= (1<<pin);
  52         else
  53                 PUEN(port) &= ~(1<<pin);
  54
  55         /* Data direction */
  56         if(gpio_mode & GPIO_OUT)
  57                 DDIR(port) |= 1<<pin;
  58         else
  59                 DDIR(port) &= ~(1<<pin);
  60
  61         /* Primary / alternate function */
  62         if(gpio_mode & GPIO_AF)
  63                 GPR(port) |= (1<<pin);
  64         else
  65                 GPR(port) &= ~(1<<pin);
  66
  67         /* use as gpio? */
  68         if(gpio_mode &  GPIO_GIUS)
  69                 GIUS(port) |= (1<<pin);
  70         else
  71                 GIUS(port) &= ~(1<<pin);
  72
  73         /* Output / input configuration */
  74         /* FIXME: I'm not very sure about OCR and ICONF, someone
  75          * should have a look over it
  76          */
  77         if(pin<16) {
  78                 tmp = OCR1(port);
  79                 tmp &= ~( 3<<(pin*2));
  80                 tmp |= (ocr << (pin*2));
  81                 OCR1(port) = tmp;
  82
  83                 ICONFA1(port) &= ~( 3<<(pin*2));
  84                 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
  85                 ICONFB1(port) &= ~( 3<<(pin*2));
  86                 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
  87         } else {
  88                 tmp = OCR2(port);
  89                 tmp &= ~( 3<<((pin-16)*2));
  90                 tmp |= (ocr << ((pin-16)*2));
  91                 OCR2(port) = tmp;
  92
  93                 ICONFA2(port) &= ~( 3<<((pin-16)*2));
  94                 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
  95                 ICONFB2(port) &= ~( 3<<((pin-16)*2));
  96                 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
  97         }
  98 }
  99
 100 EXPORT_SYMBOL(imx_gpio_mode);
 101
 102 int imx_gpio_request(unsigned gpio, const char *label)
 103 {
 104         if(gpio >= (GPIO_PORT_MAX + 1) * 32) {
 105                 printk(KERN_ERR "imx_gpio: Attempt to request nonexistent GPIO %d for \"%s\"\n",
 106                         gpio, label ? label : "?");
 107                 return -EINVAL;
 108         }
 109
 110         if(test_and_set_bit(gpio, imx_gpio_alloc_map)) {
 111                 printk(KERN_ERR "imx_gpio: GPIO %d already used. Allocation for \"%s\" failed\n",
 112                         gpio, label ? label : "?");
 113                 return -EBUSY;
 114         }
 115
 116         return 0;
 117 }
 118
 119 EXPORT_SYMBOL(imx_gpio_request);
 120
 121 void imx_gpio_free(unsigned gpio)
 122 {
 123         if(gpio >= (GPIO_PORT_MAX + 1) * 32)
 124                 return;
 125
 126         clear_bit(gpio, imx_gpio_alloc_map);
 127 }
 128
 129 EXPORT_SYMBOL(imx_gpio_free);
 130
 131 int imx_gpio_direction_input(unsigned gpio)
 132 {
 133         imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_DR);
 134         return 0;
 135 }
 136
 137 EXPORT_SYMBOL(imx_gpio_direction_input);
 138
 139 int imx_gpio_direction_output(unsigned gpio, int value)
 140 {
 141         imx_gpio_set_value(gpio, value);
 142         imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_DR);
 143         return 0;
 144 }
 145
 146 EXPORT_SYMBOL(imx_gpio_direction_output);
 147
 148 int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
 149                                 int alloc_mode, const char *label)
 150 {
 151         const int *p = pin_list;
 152         int i;
 153         unsigned gpio;
 154         unsigned mode;
 155
 156         for (i = 0; i < count; i++) {
 157                 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
 158                 mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK);
 159
 160                 if (gpio >= (GPIO_PORT_MAX + 1) * 32)
 161                         goto setup_error;
 162
 163                 if (alloc_mode & IMX_GPIO_ALLOC_MODE_RELEASE)
 164                         imx_gpio_free(gpio);
 165                 else if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_NO_ALLOC))
 166                         if (imx_gpio_request(gpio, label))
 167                                 if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
 168                                         goto setup_error;
 169
 170                 if (!(alloc_mode & (IMX_GPIO_ALLOC_MODE_ALLOC_ONLY |
 171                                     IMX_GPIO_ALLOC_MODE_RELEASE)))
 172                         imx_gpio_mode(gpio | mode);
 173
 174                 p++;
 175         }
 176         return 0;
 177
 178 setup_error:
 179         if(alloc_mode & (IMX_GPIO_ALLOC_MODE_NO_ALLOC |
 180                          IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
 181                 return -EINVAL;
 182
 183         while (p != pin_list) {
 184                 p--;
 185                 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
 186                 imx_gpio_free(gpio);
 187         }
 188
 189         return -EINVAL;
 190 }
 191
 192 EXPORT_SYMBOL(imx_gpio_setup_multiple_pins);
 193
 194 void __imx_gpio_set_value(unsigned gpio, int value)
 195 {
 196         imx_gpio_set_value_inline(gpio, value);
 197 }
 198
 199 EXPORT_SYMBOL(__imx_gpio_set_value);
 200
 201 int imx_gpio_to_irq(unsigned gpio)
 202 {
 203         return IRQ_GPIOA(0) + gpio;
 204 }
 205
 206 EXPORT_SYMBOL(imx_gpio_to_irq);
 207
 208 int imx_irq_to_gpio(unsigned irq)
 209 {
 210         if (irq < IRQ_GPIOA(0))
 211                 return -EINVAL;
 212         return irq - IRQ_GPIOA(0);
 213 }
 214
 215 EXPORT_SYMBOL(imx_irq_to_gpio);
 216
 217 static struct resource imx_mmc_resources[] = {
 218         [0] = {
 219                 .start  = 0x00214000,
 220                 .end    = 0x002140FF,
 221                 .flags  = IORESOURCE_MEM,
 222         },
 223         [1] = {
 224                 .start  = (SDHC_INT),
 225                 .end    = (SDHC_INT),
 226                 .flags  = IORESOURCE_IRQ,
 227         },
 228 };
 229
 230 static u64 imxmmmc_dmamask = 0xffffffffUL;
 231
 232 static struct platform_device imx_mmc_device = {
 233         .name           = "imx-mmc",
 234         .id             = 0,
 235         .dev            = {
 236                 .dma_mask = &imxmmmc_dmamask,
 237                 .coherent_dma_mask = 0xffffffff,
 238         },
 239         .num_resources  = ARRAY_SIZE(imx_mmc_resources),
 240         .resource       = imx_mmc_resources,
 241 };
 242
 243 void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
 244 {
 245         imx_mmc_device.dev.platform_data = info;
 246 }
 247
 248 static struct imx_fb_platform_data imx_fb_info;
 249
 250 void __init set_imx_fb_info(struct imx_fb_platform_data *hard_imx_fb_info)
 251 {
 252         memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imx_fb_platform_data));
 253 }
 254
 255 static struct resource imxfb_resources[] = {
 256         [0] = {
 257                 .start  = 0x00205000,
 258                 .end    = 0x002050FF,
 259                 .flags  = IORESOURCE_MEM,
 260         },
 261         [1] = {
 262                 .start  = LCDC_INT,
 263                 .end    = LCDC_INT,
 264                 .flags  = IORESOURCE_IRQ,
 265         },
 266 };
 267
 268 static u64 fb_dma_mask = ~(u64)0;
 269
 270 static struct platform_device imxfb_device = {
 271         .name           = "imx-fb",
 272         .id             = 0,
 273         .dev            = {
 274                 .platform_data  = &imx_fb_info,
 275                 .dma_mask       = &fb_dma_mask,
 276                 .coherent_dma_mask = 0xffffffff,
 277         },
 278         .num_resources  = ARRAY_SIZE(imxfb_resources),
 279         .resource       = imxfb_resources,
 280 };
 281
 282 static struct platform_device *devices[] __initdata = {
 283         &imx_mmc_device,
 284         &imxfb_device,
 285 };
 286
 287 static struct map_desc imx_io_desc[] __initdata = {
 288         {
 289                 .virtual        = IMX_IO_BASE,
 290                 .pfn            = __phys_to_pfn(IMX_IO_PHYS),
 291                 .length         = IMX_IO_SIZE,
 292                 .type           = MT_DEVICE
 293         }
 294 };
 295
 296 void __init
 297 imx_map_io(void)
 298 {
 299         iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
 300 }
 301
 302 static int __init imx_init(void)
 303 {
 304         return platform_add_devices(devices, ARRAY_SIZE(devices));
 305 }
 306
 307 subsys_initcall(imx_init);