arch/arm/mach-omap1/gpio16xx.c

   1 /*
   2  * OMAP16xx specific gpio init
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   5  *
   6  * Author:
   7  *      Charulatha V <charu@ti.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation version 2.
  12  *
  13  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  14  * kind, whether express or implied; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/gpio.h>
  20 #include <linux/platform_data/gpio-omap.h>
  21
  22 #define OMAP1610_GPIO1_BASE             0xfffbe400
  23 #define OMAP1610_GPIO2_BASE             0xfffbec00
  24 #define OMAP1610_GPIO3_BASE             0xfffbb400
  25 #define OMAP1610_GPIO4_BASE             0xfffbbc00
  26 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  27
  28 /* smart idle, enable wakeup */
  29 #define SYSCONFIG_WORD                  0x14
  30
  31 /* mpu gpio */
  32 static struct __initdata resource omap16xx_mpu_gpio_resources[] = {
  33         {
  34                 .start  = OMAP1_MPUIO_VBASE,
  35                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  36                 .flags  = IORESOURCE_MEM,
  37         },
  38         {
  39                 .start  = INT_MPUIO,
  40                 .flags  = IORESOURCE_IRQ,
  41         },
  42 };
  43
  44 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
  45         .revision       = USHRT_MAX,
  46         .direction      = OMAP_MPUIO_IO_CNTL,
  47         .datain         = OMAP_MPUIO_INPUT_LATCH,
  48         .dataout        = OMAP_MPUIO_OUTPUT,
  49         .irqstatus      = OMAP_MPUIO_GPIO_INT,
  50         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  51         .irqenable_inv  = true,
  52         .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
  53 };
  54
  55 static struct __initdata omap_gpio_platform_data omap16xx_mpu_gpio_config = {
  56         .is_mpuio               = true,
  57         .bank_width             = 16,
  58         .bank_stride            = 1,
  59         .regs                   = &omap16xx_mpuio_regs,
  60 };
  61
  62 static struct platform_device omap16xx_mpu_gpio = {
  63         .name           = "omap_gpio",
  64         .id             = 0,
  65         .dev            = {
  66                 .platform_data = &omap16xx_mpu_gpio_config,
  67         },
  68         .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
  69         .resource = omap16xx_mpu_gpio_resources,
  70 };
  71
  72 /* gpio1 */
  73 static struct __initdata resource omap16xx_gpio1_resources[] = {
  74         {
  75                 .start  = OMAP1610_GPIO1_BASE,
  76                 .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
  77                 .flags  = IORESOURCE_MEM,
  78         },
  79         {
  80                 .start  = INT_GPIO_BANK1,
  81                 .flags  = IORESOURCE_IRQ,
  82         },
  83 };
  84
  85 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
  86         .revision       = OMAP1610_GPIO_REVISION,
  87         .direction      = OMAP1610_GPIO_DIRECTION,
  88         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
  89         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
  90         .datain         = OMAP1610_GPIO_DATAIN,
  91         .dataout        = OMAP1610_GPIO_DATAOUT,
  92         .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
  93         .irqenable      = OMAP1610_GPIO_IRQENABLE1,
  94         .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
  95         .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
  96         .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
  97         .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
  98         .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
  99 };
 100
 101 static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = {
 102         .bank_width             = 16,
 103         .regs                   = &omap16xx_gpio_regs,
 104 };
 105
 106 static struct platform_device omap16xx_gpio1 = {
 107         .name           = "omap_gpio",
 108         .id             = 1,
 109         .dev            = {
 110                 .platform_data = &omap16xx_gpio1_config,
 111         },
 112         .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
 113         .resource = omap16xx_gpio1_resources,
 114 };
 115
 116 /* gpio2 */
 117 static struct __initdata resource omap16xx_gpio2_resources[] = {
 118         {
 119                 .start  = OMAP1610_GPIO2_BASE,
 120                 .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
 121                 .flags  = IORESOURCE_MEM,
 122         },
 123         {
 124                 .start  = INT_1610_GPIO_BANK2,
 125                 .flags  = IORESOURCE_IRQ,
 126         },
 127 };
 128
 129 static struct __initdata omap_gpio_platform_data omap16xx_gpio2_config = {
 130         .bank_width             = 16,
 131         .regs                   = &omap16xx_gpio_regs,
 132 };
 133
 134 static struct platform_device omap16xx_gpio2 = {
 135         .name           = "omap_gpio",
 136         .id             = 2,
 137         .dev            = {
 138                 .platform_data = &omap16xx_gpio2_config,
 139         },
 140         .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
 141         .resource = omap16xx_gpio2_resources,
 142 };
 143
 144 /* gpio3 */
 145 static struct __initdata resource omap16xx_gpio3_resources[] = {
 146         {
 147                 .start  = OMAP1610_GPIO3_BASE,
 148                 .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
 149                 .flags  = IORESOURCE_MEM,
 150         },
 151         {
 152                 .start  = INT_1610_GPIO_BANK3,
 153                 .flags  = IORESOURCE_IRQ,
 154         },
 155 };
 156
 157 static struct __initdata omap_gpio_platform_data omap16xx_gpio3_config = {
 158         .bank_width             = 16,
 159         .regs                   = &omap16xx_gpio_regs,
 160 };
 161
 162 static struct platform_device omap16xx_gpio3 = {
 163         .name           = "omap_gpio",
 164         .id             = 3,
 165         .dev            = {
 166                 .platform_data = &omap16xx_gpio3_config,
 167         },
 168         .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
 169         .resource = omap16xx_gpio3_resources,
 170 };
 171
 172 /* gpio4 */
 173 static struct __initdata resource omap16xx_gpio4_resources[] = {
 174         {
 175                 .start  = OMAP1610_GPIO4_BASE,
 176                 .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
 177                 .flags  = IORESOURCE_MEM,
 178         },
 179         {
 180                 .start  = INT_1610_GPIO_BANK4,
 181                 .flags  = IORESOURCE_IRQ,
 182         },
 183 };
 184
 185 static struct __initdata omap_gpio_platform_data omap16xx_gpio4_config = {
 186         .bank_width             = 16,
 187         .regs                   = &omap16xx_gpio_regs,
 188 };
 189
 190 static struct platform_device omap16xx_gpio4 = {
 191         .name           = "omap_gpio",
 192         .id             = 4,
 193         .dev            = {
 194                 .platform_data = &omap16xx_gpio4_config,
 195         },
 196         .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
 197         .resource = omap16xx_gpio4_resources,
 198 };
 199
 200 static struct __initdata platform_device * omap16xx_gpio_dev[] = {
 201         &omap16xx_mpu_gpio,
 202         &omap16xx_gpio1,
 203         &omap16xx_gpio2,
 204         &omap16xx_gpio3,
 205         &omap16xx_gpio4,
 206 };
 207
 208 /*
 209  * omap16xx_gpio_init needs to be done before
 210  * machine_init functions access gpio APIs.
 211  * Hence omap16xx_gpio_init is a postcore_initcall.
 212  */
 213 static int __init omap16xx_gpio_init(void)
 214 {
 215         int i;
 216         void __iomem *base;
 217         struct resource *res;
 218         struct platform_device *pdev;
 219         struct omap_gpio_platform_data *pdata;
 220
 221         if (!cpu_is_omap16xx())
 222                 return -EINVAL;
 223
 224         /*
 225          * Enable system clock for GPIO module.
 226          * The CAM_CLK_CTRL *is* really the right place.
 227          */
 228         omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
 229                                         ULPD_CAM_CLK_CTRL);
 230
 231         for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
 232                 pdev = omap16xx_gpio_dev[i];
 233                 pdata = pdev->dev.platform_data;
 234
 235                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 236                 if (unlikely(!res)) {
 237                         dev_err(&pdev->dev, "Invalid mem resource.\n");
 238                         return -ENODEV;
 239                 }
 240
 241                 base = ioremap(res->start, resource_size(res));
 242                 if (unlikely(!base)) {
 243                         dev_err(&pdev->dev, "ioremap failed.\n");
 244                         return -ENOMEM;
 245                 }
 246
 247                 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
 248                 iounmap(base);
 249
 250                 platform_device_register(omap16xx_gpio_dev[i]);
 251         }
 252
 253         return 0;
 254 }
 255 postcore_initcall(omap16xx_gpio_init);