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