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 #include <mach/irqs.h>
  23
  24 #define OMAP1610_GPIO1_BASE             0xfffbe400
  25 #define OMAP1610_GPIO2_BASE             0xfffbec00
  26 #define OMAP1610_GPIO3_BASE             0xfffbb400
  27 #define OMAP1610_GPIO4_BASE             0xfffbbc00
  28 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  29
  30 /* smart idle, enable wakeup */
  31 #define SYSCONFIG_WORD                  0x14
  32
  33 /* mpu gpio */
  34 static struct __initdata resource omap16xx_mpu_gpio_resources[] = {
  35         {
  36                 .start  = OMAP1_MPUIO_VBASE,
  37                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  38                 .flags  = IORESOURCE_MEM,
  39         },
  40         {
  41                 .start  = INT_MPUIO,
  42                 .flags  = IORESOURCE_IRQ,
  43         },
  44 };
  45
  46 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
  47         .revision       = USHRT_MAX,
  48         .direction      = OMAP_MPUIO_IO_CNTL,
  49         .datain         = OMAP_MPUIO_INPUT_LATCH,
  50         .dataout        = OMAP_MPUIO_OUTPUT,
  51         .irqstatus      = OMAP_MPUIO_GPIO_INT,
  52         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  53         .irqenable_inv  = true,
  54         .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
  55 };
  56
  57 static struct __initdata omap_gpio_platform_data omap16xx_mpu_gpio_config = {
  58         .is_mpuio               = true,
  59         .bank_width             = 16,
  60         .bank_stride            = 1,
  61         .regs                   = &omap16xx_mpuio_regs,
  62 };
  63
  64 static struct platform_device omap16xx_mpu_gpio = {
  65         .name           = "omap_gpio",
  66         .id             = 0,
  67         .dev            = {
  68                 .platform_data = &omap16xx_mpu_gpio_config,
  69         },
  70         .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
  71         .resource = omap16xx_mpu_gpio_resources,
  72 };
  73
  74 /* gpio1 */
  75 static struct __initdata resource omap16xx_gpio1_resources[] = {
  76         {
  77                 .start  = OMAP1610_GPIO1_BASE,
  78                 .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
  79                 .flags  = IORESOURCE_MEM,
  80         },
  81         {
  82                 .start  = INT_GPIO_BANK1,
  83                 .flags  = IORESOURCE_IRQ,
  84         },
  85 };
  86
  87 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
  88         .revision       = OMAP1610_GPIO_REVISION,
  89         .direction      = OMAP1610_GPIO_DIRECTION,
  90         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
  91         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
  92         .datain         = OMAP1610_GPIO_DATAIN,
  93         .dataout        = OMAP1610_GPIO_DATAOUT,
  94         .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
  95         .irqenable      = OMAP1610_GPIO_IRQENABLE1,
  96         .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
  97         .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
  98         .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
  99         .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
 100         .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
 101 };
 102
 103 static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = {
 104         .bank_width             = 16,
 105         .regs                   = &omap16xx_gpio_regs,
 106 };
 107
 108 static struct platform_device omap16xx_gpio1 = {
 109         .name           = "omap_gpio",
 110         .id             = 1,
 111         .dev            = {
 112                 .platform_data = &omap16xx_gpio1_config,
 113         },
 114         .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
 115         .resource = omap16xx_gpio1_resources,
 116 };
 117
 118 /* gpio2 */
 119 static struct __initdata resource omap16xx_gpio2_resources[] = {
 120         {
 121                 .start  = OMAP1610_GPIO2_BASE,
 122                 .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
 123                 .flags  = IORESOURCE_MEM,
 124         },
 125         {
 126                 .start  = INT_1610_GPIO_BANK2,
 127                 .flags  = IORESOURCE_IRQ,
 128         },
 129 };
 130
 131 static struct __initdata omap_gpio_platform_data omap16xx_gpio2_config = {
 132         .bank_width             = 16,
 133         .regs                   = &omap16xx_gpio_regs,
 134 };
 135
 136 static struct platform_device omap16xx_gpio2 = {
 137         .name           = "omap_gpio",
 138         .id             = 2,
 139         .dev            = {
 140                 .platform_data = &omap16xx_gpio2_config,
 141         },
 142         .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
 143         .resource = omap16xx_gpio2_resources,
 144 };
 145
 146 /* gpio3 */
 147 static struct __initdata resource omap16xx_gpio3_resources[] = {
 148         {
 149                 .start  = OMAP1610_GPIO3_BASE,
 150                 .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
 151                 .flags  = IORESOURCE_MEM,
 152         },
 153         {
 154                 .start  = INT_1610_GPIO_BANK3,
 155                 .flags  = IORESOURCE_IRQ,
 156         },
 157 };
 158
 159 static struct __initdata omap_gpio_platform_data omap16xx_gpio3_config = {
 160         .bank_width             = 16,
 161         .regs                   = &omap16xx_gpio_regs,
 162 };
 163
 164 static struct platform_device omap16xx_gpio3 = {
 165         .name           = "omap_gpio",
 166         .id             = 3,
 167         .dev            = {
 168                 .platform_data = &omap16xx_gpio3_config,
 169         },
 170         .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
 171         .resource = omap16xx_gpio3_resources,
 172 };
 173
 174 /* gpio4 */
 175 static struct __initdata resource omap16xx_gpio4_resources[] = {
 176         {
 177                 .start  = OMAP1610_GPIO4_BASE,
 178                 .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
 179                 .flags  = IORESOURCE_MEM,
 180         },
 181         {
 182                 .start  = INT_1610_GPIO_BANK4,
 183                 .flags  = IORESOURCE_IRQ,
 184         },
 185 };
 186
 187 static struct __initdata omap_gpio_platform_data omap16xx_gpio4_config = {
 188         .bank_width             = 16,
 189         .regs                   = &omap16xx_gpio_regs,
 190 };
 191
 192 static struct platform_device omap16xx_gpio4 = {
 193         .name           = "omap_gpio",
 194         .id             = 4,
 195         .dev            = {
 196                 .platform_data = &omap16xx_gpio4_config,
 197         },
 198         .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
 199         .resource = omap16xx_gpio4_resources,
 200 };
 201
 202 static struct __initdata platform_device * omap16xx_gpio_dev[] = {
 203         &omap16xx_mpu_gpio,
 204         &omap16xx_gpio1,
 205         &omap16xx_gpio2,
 206         &omap16xx_gpio3,
 207         &omap16xx_gpio4,
 208 };
 209
 210 /*
 211  * omap16xx_gpio_init needs to be done before
 212  * machine_init functions access gpio APIs.
 213  * Hence omap16xx_gpio_init is a postcore_initcall.
 214  */
 215 static int __init omap16xx_gpio_init(void)
 216 {
 217         int i;
 218         void __iomem *base;
 219         struct resource *res;
 220         struct platform_device *pdev;
 221         struct omap_gpio_platform_data *pdata;
 222
 223         if (!cpu_is_omap16xx())
 224                 return -EINVAL;
 225
 226         /*
 227          * Enable system clock for GPIO module.
 228          * The CAM_CLK_CTRL *is* really the right place.
 229          */
 230         omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
 231                                         ULPD_CAM_CLK_CTRL);
 232
 233         for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
 234                 pdev = omap16xx_gpio_dev[i];
 235                 pdata = pdev->dev.platform_data;
 236
 237                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 238                 if (unlikely(!res)) {
 239                         dev_err(&pdev->dev, "Invalid mem resource.\n");
 240                         return -ENODEV;
 241                 }
 242
 243                 base = ioremap(res->start, resource_size(res));
 244                 if (unlikely(!base)) {
 245                         dev_err(&pdev->dev, "ioremap failed.\n");
 246                         return -ENOMEM;
 247                 }
 248
 249                 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
 250                 iounmap(base);
 251
 252                 platform_device_register(omap16xx_gpio_dev[i]);
 253         }
 254
 255         return 0;
 256 }
 257 postcore_initcall(omap16xx_gpio_init);