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