arch/arm/mach-omap1/gpio16xx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * OMAP16xx specific gpio init
   4  *
   5  * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com/
   6  *
   7  * Author:
   8  *      Charulatha V <charu@ti.com>
   9  */
  10
  11 #include <linux/gpio.h>
  12 #include <linux/platform_data/gpio-omap.h>
  13 #include <linux/soc/ti/omap1-io.h>
  14
  15 #include "hardware.h"
  16 #include "irqs.h"
  17 #include "soc.h"
  18
  19 #define OMAP1610_GPIO1_BASE             0xfffbe400
  20 #define OMAP1610_GPIO2_BASE             0xfffbec00
  21 #define OMAP1610_GPIO3_BASE             0xfffbb400
  22 #define OMAP1610_GPIO4_BASE             0xfffbbc00
  23 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  24
  25 /* smart idle, enable wakeup */
  26 #define SYSCONFIG_WORD                  0x14
  27
  28 /* mpu gpio */
  29 static struct resource omap16xx_mpu_gpio_resources[] = {
  30         {
  31                 .start  = OMAP1_MPUIO_VBASE,
  32                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  33                 .flags  = IORESOURCE_MEM,
  34         },
  35         {
  36                 .start  = INT_MPUIO,
  37                 .flags  = IORESOURCE_IRQ,
  38         },
  39 };
  40
  41 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
  42         .revision       = USHRT_MAX,
  43         .direction      = OMAP_MPUIO_IO_CNTL,
  44         .datain         = OMAP_MPUIO_INPUT_LATCH,
  45         .dataout        = OMAP_MPUIO_OUTPUT,
  46         .irqstatus      = OMAP_MPUIO_GPIO_INT,
  47         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  48         .irqenable_inv  = true,
  49         .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
  50 };
  51
  52 static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = {
  53         .is_mpuio               = true,
  54         .bank_width             = 16,
  55         .bank_stride            = 1,
  56         .regs                   = &omap16xx_mpuio_regs,
  57 };
  58
  59 static struct platform_device omap16xx_mpu_gpio = {
  60         .name           = "omap_gpio",
  61         .id             = 0,
  62         .dev            = {
  63                 .platform_data = &omap16xx_mpu_gpio_config,
  64         },
  65         .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
  66         .resource = omap16xx_mpu_gpio_resources,
  67 };
  68
  69 /* gpio1 */
  70 static struct resource omap16xx_gpio1_resources[] = {
  71         {
  72                 .start  = OMAP1610_GPIO1_BASE,
  73                 .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
  74                 .flags  = IORESOURCE_MEM,
  75         },
  76         {
  77                 .start  = INT_GPIO_BANK1,
  78                 .flags  = IORESOURCE_IRQ,
  79         },
  80 };
  81
  82 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
  83         .revision       = OMAP1610_GPIO_REVISION,
  84         .direction      = OMAP1610_GPIO_DIRECTION,
  85         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
  86         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
  87         .datain         = OMAP1610_GPIO_DATAIN,
  88         .dataout        = OMAP1610_GPIO_DATAOUT,
  89         .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
  90         .irqenable      = OMAP1610_GPIO_IRQENABLE1,
  91         .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
  92         .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
  93         .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
  94         .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
  95         .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
  96 };
  97
  98 static struct omap_gpio_platform_data omap16xx_gpio1_config = {
  99         .bank_width             = 16,
 100         .regs                   = &omap16xx_gpio_regs,
 101 };
 102
 103 static struct platform_device omap16xx_gpio1 = {
 104         .name           = "omap_gpio",
 105         .id             = 1,
 106         .dev            = {
 107                 .platform_data = &omap16xx_gpio1_config,
 108         },
 109         .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
 110         .resource = omap16xx_gpio1_resources,
 111 };
 112
 113 /* gpio2 */
 114 static struct resource omap16xx_gpio2_resources[] = {
 115         {
 116                 .start  = OMAP1610_GPIO2_BASE,
 117                 .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
 118                 .flags  = IORESOURCE_MEM,
 119         },
 120         {
 121                 .start  = INT_1610_GPIO_BANK2,
 122                 .flags  = IORESOURCE_IRQ,
 123         },
 124 };
 125
 126 static struct omap_gpio_platform_data omap16xx_gpio2_config = {
 127         .bank_width             = 16,
 128         .regs                   = &omap16xx_gpio_regs,
 129 };
 130
 131 static struct platform_device omap16xx_gpio2 = {
 132         .name           = "omap_gpio",
 133         .id             = 2,
 134         .dev            = {
 135                 .platform_data = &omap16xx_gpio2_config,
 136         },
 137         .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
 138         .resource = omap16xx_gpio2_resources,
 139 };
 140
 141 /* gpio3 */
 142 static struct resource omap16xx_gpio3_resources[] = {
 143         {
 144                 .start  = OMAP1610_GPIO3_BASE,
 145                 .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
 146                 .flags  = IORESOURCE_MEM,
 147         },
 148         {
 149                 .start  = INT_1610_GPIO_BANK3,
 150                 .flags  = IORESOURCE_IRQ,
 151         },
 152 };
 153
 154 static struct omap_gpio_platform_data omap16xx_gpio3_config = {
 155         .bank_width             = 16,
 156         .regs                   = &omap16xx_gpio_regs,
 157 };
 158
 159 static struct platform_device omap16xx_gpio3 = {
 160         .name           = "omap_gpio",
 161         .id             = 3,
 162         .dev            = {
 163                 .platform_data = &omap16xx_gpio3_config,
 164         },
 165         .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
 166         .resource = omap16xx_gpio3_resources,
 167 };
 168
 169 /* gpio4 */
 170 static struct resource omap16xx_gpio4_resources[] = {
 171         {
 172                 .start  = OMAP1610_GPIO4_BASE,
 173                 .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
 174                 .flags  = IORESOURCE_MEM,
 175         },
 176         {
 177                 .start  = INT_1610_GPIO_BANK4,
 178                 .flags  = IORESOURCE_IRQ,
 179         },
 180 };
 181
 182 static struct omap_gpio_platform_data omap16xx_gpio4_config = {
 183         .bank_width             = 16,
 184         .regs                   = &omap16xx_gpio_regs,
 185 };
 186
 187 static struct platform_device omap16xx_gpio4 = {
 188         .name           = "omap_gpio",
 189         .id             = 4,
 190         .dev            = {
 191                 .platform_data = &omap16xx_gpio4_config,
 192         },
 193         .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
 194         .resource = omap16xx_gpio4_resources,
 195 };
 196
 197 static struct platform_device *omap16xx_gpio_dev[] __initdata = {
 198         &omap16xx_mpu_gpio,
 199         &omap16xx_gpio1,
 200         &omap16xx_gpio2,
 201         &omap16xx_gpio3,
 202         &omap16xx_gpio4,
 203 };
 204
 205 /*
 206  * omap16xx_gpio_init needs to be done before
 207  * machine_init functions access gpio APIs.
 208  * Hence omap16xx_gpio_init is a postcore_initcall.
 209  */
 210 static int __init omap16xx_gpio_init(void)
 211 {
 212         int i;
 213         void __iomem *base;
 214         struct resource *res;
 215         struct platform_device *pdev;
 216         struct omap_gpio_platform_data *pdata;
 217
 218         if (!cpu_is_omap16xx())
 219                 return -EINVAL;
 220
 221         /*
 222          * Enable system clock for GPIO module.
 223          * The CAM_CLK_CTRL *is* really the right place.
 224          */
 225         omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
 226                                         ULPD_CAM_CLK_CTRL);
 227
 228         for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
 229                 pdev = omap16xx_gpio_dev[i];
 230                 pdata = pdev->dev.platform_data;
 231
 232                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 233                 if (unlikely(!res)) {
 234                         dev_err(&pdev->dev, "Invalid mem resource.\n");
 235                         return -ENODEV;
 236                 }
 237
 238                 base = ioremap(res->start, resource_size(res));
 239                 if (unlikely(!base)) {
 240                         dev_err(&pdev->dev, "ioremap failed.\n");
 241                         return -ENOMEM;
 242                 }
 243
 244                 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
 245                 iounmap(base);
 246
 247                 platform_device_register(omap16xx_gpio_dev[i]);
 248         }
 249
 250         return 0;
 251 }
 252 postcore_initcall(omap16xx_gpio_init);