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