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); 260