arch/arm/mach-omap1/gpio16xx.c

   1 /*
   2  * OMAP16xx specific gpio init
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - https://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 #include <linux/soc/ti/omap1-io.h>
  22
  23 #include "hardware.h"
  24 #include "irqs.h"
  25 #include "soc.h"
  26
  27 #define OMAP1610_GPIO1_BASE             0xfffbe400
  28 #define OMAP1610_GPIO2_BASE             0xfffbec00
  29 #define OMAP1610_GPIO3_BASE             0xfffbb400
  30 #define OMAP1610_GPIO4_BASE             0xfffbbc00
  31 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  32
  33 /* smart idle, enable wakeup */
  34 #define SYSCONFIG_WORD                  0x14
  35
  36 /* mpu gpio */
  37 static struct resource omap16xx_mpu_gpio_resources[] = {
  38         {
  39                 .start  = OMAP1_MPUIO_VBASE,
  40                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  41                 .flags  = IORESOURCE_MEM,
  42         },
  43         {
  44                 .start  = INT_MPUIO,
  45                 .flags  = IORESOURCE_IRQ,
  46         },
  47 };
  48
  49 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
  50         .revision       = USHRT_MAX,
  51         .direction      = OMAP_MPUIO_IO_CNTL,
  52         .datain         = OMAP_MPUIO_INPUT_LATCH,
  53         .dataout        = OMAP_MPUIO_OUTPUT,
  54         .irqstatus      = OMAP_MPUIO_GPIO_INT,
  55         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  56         .irqenable_inv  = true,
  57         .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
  58 };
  59
  60 static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = {
  61         .is_mpuio               = true,
  62         .bank_width             = 16,
  63         .bank_stride            = 1,
  64         .regs                   = &omap16xx_mpuio_regs,
  65 };
  66
  67 static struct platform_device omap16xx_mpu_gpio = {
  68         .name           = "omap_gpio",
  69         .id             = 0,
  70         .dev            = {
  71                 .platform_data = &omap16xx_mpu_gpio_config,
  72         },
  73         .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
  74         .resource = omap16xx_mpu_gpio_resources,
  75 };
  76
  77 /* gpio1 */
  78 static struct resource omap16xx_gpio1_resources[] = {
  79         {
  80                 .start  = OMAP1610_GPIO1_BASE,
  81                 .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
  82                 .flags  = IORESOURCE_MEM,
  83         },
  84         {
  85                 .start  = INT_GPIO_BANK1,
  86                 .flags  = IORESOURCE_IRQ,
  87         },
  88 };
  89
  90 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
  91         .revision       = OMAP1610_GPIO_REVISION,
  92         .direction      = OMAP1610_GPIO_DIRECTION,
  93         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
  94         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
  95         .datain         = OMAP1610_GPIO_DATAIN,
  96         .dataout        = OMAP1610_GPIO_DATAOUT,
  97         .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
  98         .irqenable      = OMAP1610_GPIO_IRQENABLE1,
  99         .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
 100         .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
 101         .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
 102         .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
 103         .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
 104 };
 105
 106 static struct omap_gpio_platform_data omap16xx_gpio1_config = {
 107         .bank_width             = 16,
 108         .regs                   = &omap16xx_gpio_regs,
 109 };
 110
 111 static struct platform_device omap16xx_gpio1 = {
 112         .name           = "omap_gpio",
 113         .id             = 1,
 114         .dev            = {
 115                 .platform_data = &omap16xx_gpio1_config,
 116         },
 117         .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
 118         .resource = omap16xx_gpio1_resources,
 119 };
 120
 121 /* gpio2 */
 122 static struct resource omap16xx_gpio2_resources[] = {
 123         {
 124                 .start  = OMAP1610_GPIO2_BASE,
 125                 .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
 126                 .flags  = IORESOURCE_MEM,
 127         },
 128         {
 129                 .start  = INT_1610_GPIO_BANK2,
 130                 .flags  = IORESOURCE_IRQ,
 131         },
 132 };
 133
 134 static struct omap_gpio_platform_data omap16xx_gpio2_config = {
 135         .bank_width             = 16,
 136         .regs                   = &omap16xx_gpio_regs,
 137 };
 138
 139 static struct platform_device omap16xx_gpio2 = {
 140         .name           = "omap_gpio",
 141         .id             = 2,
 142         .dev            = {
 143                 .platform_data = &omap16xx_gpio2_config,
 144         },
 145         .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
 146         .resource = omap16xx_gpio2_resources,
 147 };
 148
 149 /* gpio3 */
 150 static struct resource omap16xx_gpio3_resources[] = {
 151         {
 152                 .start  = OMAP1610_GPIO3_BASE,
 153                 .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
 154                 .flags  = IORESOURCE_MEM,
 155         },
 156         {
 157                 .start  = INT_1610_GPIO_BANK3,
 158                 .flags  = IORESOURCE_IRQ,
 159         },
 160 };
 161
 162 static struct omap_gpio_platform_data omap16xx_gpio3_config = {
 163         .bank_width             = 16,
 164         .regs                   = &omap16xx_gpio_regs,
 165 };
 166
 167 static struct platform_device omap16xx_gpio3 = {
 168         .name           = "omap_gpio",
 169         .id             = 3,
 170         .dev            = {
 171                 .platform_data = &omap16xx_gpio3_config,
 172         },
 173         .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
 174         .resource = omap16xx_gpio3_resources,
 175 };
 176
 177 /* gpio4 */
 178 static struct resource omap16xx_gpio4_resources[] = {
 179         {
 180                 .start  = OMAP1610_GPIO4_BASE,
 181                 .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
 182                 .flags  = IORESOURCE_MEM,
 183         },
 184         {
 185                 .start  = INT_1610_GPIO_BANK4,
 186                 .flags  = IORESOURCE_IRQ,
 187         },
 188 };
 189
 190 static struct omap_gpio_platform_data omap16xx_gpio4_config = {
 191         .bank_width             = 16,
 192         .regs                   = &omap16xx_gpio_regs,
 193 };
 194
 195 static struct platform_device omap16xx_gpio4 = {
 196         .name           = "omap_gpio",
 197         .id             = 4,
 198         .dev            = {
 199                 .platform_data = &omap16xx_gpio4_config,
 200         },
 201         .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
 202         .resource = omap16xx_gpio4_resources,
 203 };
 204
 205 static struct platform_device *omap16xx_gpio_dev[] __initdata = {
 206         &omap16xx_mpu_gpio,
 207         &omap16xx_gpio1,
 208         &omap16xx_gpio2,
 209         &omap16xx_gpio3,
 210         &omap16xx_gpio4,
 211 };
 212
 213 /*
 214  * omap16xx_gpio_init needs to be done before
 215  * machine_init functions access gpio APIs.
 216  * Hence omap16xx_gpio_init is a postcore_initcall.
 217  */
 218 static int __init omap16xx_gpio_init(void)
 219 {
 220         int i;
 221         void __iomem *base;
 222         struct resource *res;
 223         struct platform_device *pdev;
 224         struct omap_gpio_platform_data *pdata;
 225
 226         if (!cpu_is_omap16xx())
 227                 return -EINVAL;
 228
 229         /*
 230          * Enable system clock for GPIO module.
 231          * The CAM_CLK_CTRL *is* really the right place.
 232          */
 233         omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
 234                                         ULPD_CAM_CLK_CTRL);
 235
 236         for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
 237                 pdev = omap16xx_gpio_dev[i];
 238                 pdata = pdev->dev.platform_data;
 239
 240                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 241                 if (unlikely(!res)) {
 242                         dev_err(&pdev->dev, "Invalid mem resource.\n");
 243                         return -ENODEV;
 244                 }
 245
 246                 base = ioremap(res->start, resource_size(res));
 247                 if (unlikely(!base)) {
 248                         dev_err(&pdev->dev, "ioremap failed.\n");
 249                         return -ENOMEM;
 250                 }
 251
 252                 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
 253                 iounmap(base);
 254
 255                 platform_device_register(omap16xx_gpio_dev[i]);
 256         }
 257
 258         return 0;
 259 }
 260 postcore_initcall(omap16xx_gpio_init);