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 #include <linux/platform_data/gpio-omap.h> 21 22 #define OMAP1610_GPIO1_BASE 0xfffbe400 23 #define OMAP1610_GPIO2_BASE 0xfffbec00 24 #define OMAP1610_GPIO3_BASE 0xfffbb400 25 #define OMAP1610_GPIO4_BASE 0xfffbbc00 26 #define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE 27 28 /* smart idle, enable wakeup */ 29 #define SYSCONFIG_WORD 0x14 30 31 /* mpu gpio */ 32 static struct __initdata resource omap16xx_mpu_gpio_resources[] = { 33 { 34 .start = OMAP1_MPUIO_VBASE, 35 .end = OMAP1_MPUIO_VBASE + SZ_2K - 1, 36 .flags = IORESOURCE_MEM, 37 }, 38 { 39 .start = INT_MPUIO, 40 .flags = IORESOURCE_IRQ, 41 }, 42 }; 43 44 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = { 45 .revision = USHRT_MAX, 46 .direction = OMAP_MPUIO_IO_CNTL, 47 .datain = OMAP_MPUIO_INPUT_LATCH, 48 .dataout = OMAP_MPUIO_OUTPUT, 49 .irqstatus = OMAP_MPUIO_GPIO_INT, 50 .irqenable = OMAP_MPUIO_GPIO_MASKIT, 51 .irqenable_inv = true, 52 .irqctrl = OMAP_MPUIO_GPIO_INT_EDGE, 53 }; 54 55 static struct __initdata omap_gpio_platform_data omap16xx_mpu_gpio_config = { 56 .is_mpuio = true, 57 .bank_width = 16, 58 .bank_stride = 1, 59 .regs = &omap16xx_mpuio_regs, 60 }; 61 62 static struct platform_device omap16xx_mpu_gpio = { 63 .name = "omap_gpio", 64 .id = 0, 65 .dev = { 66 .platform_data = &omap16xx_mpu_gpio_config, 67 }, 68 .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources), 69 .resource = omap16xx_mpu_gpio_resources, 70 }; 71 72 /* gpio1 */ 73 static struct __initdata resource omap16xx_gpio1_resources[] = { 74 { 75 .start = OMAP1610_GPIO1_BASE, 76 .end = OMAP1610_GPIO1_BASE + SZ_2K - 1, 77 .flags = IORESOURCE_MEM, 78 }, 79 { 80 .start = INT_GPIO_BANK1, 81 .flags = IORESOURCE_IRQ, 82 }, 83 }; 84 85 static struct omap_gpio_reg_offs omap16xx_gpio_regs = { 86 .revision = OMAP1610_GPIO_REVISION, 87 .direction = OMAP1610_GPIO_DIRECTION, 88 .set_dataout = OMAP1610_GPIO_SET_DATAOUT, 89 .clr_dataout = OMAP1610_GPIO_CLEAR_DATAOUT, 90 .datain = OMAP1610_GPIO_DATAIN, 91 .dataout = OMAP1610_GPIO_DATAOUT, 92 .irqstatus = OMAP1610_GPIO_IRQSTATUS1, 93 .irqenable = OMAP1610_GPIO_IRQENABLE1, 94 .set_irqenable = OMAP1610_GPIO_SET_IRQENABLE1, 95 .clr_irqenable = OMAP1610_GPIO_CLEAR_IRQENABLE1, 96 .wkup_en = OMAP1610_GPIO_WAKEUPENABLE, 97 .edgectrl1 = OMAP1610_GPIO_EDGE_CTRL1, 98 .edgectrl2 = OMAP1610_GPIO_EDGE_CTRL2, 99 }; 100 101 static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = { 102 .bank_width = 16, 103 .regs = &omap16xx_gpio_regs, 104 }; 105 106 static struct platform_device omap16xx_gpio1 = { 107 .name = "omap_gpio", 108 .id = 1, 109 .dev = { 110 .platform_data = &omap16xx_gpio1_config, 111 }, 112 .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources), 113 .resource = omap16xx_gpio1_resources, 114 }; 115 116 /* gpio2 */ 117 static struct __initdata resource omap16xx_gpio2_resources[] = { 118 { 119 .start = OMAP1610_GPIO2_BASE, 120 .end = OMAP1610_GPIO2_BASE + SZ_2K - 1, 121 .flags = IORESOURCE_MEM, 122 }, 123 { 124 .start = INT_1610_GPIO_BANK2, 125 .flags = IORESOURCE_IRQ, 126 }, 127 }; 128 129 static struct __initdata omap_gpio_platform_data omap16xx_gpio2_config = { 130 .bank_width = 16, 131 .regs = &omap16xx_gpio_regs, 132 }; 133 134 static struct platform_device omap16xx_gpio2 = { 135 .name = "omap_gpio", 136 .id = 2, 137 .dev = { 138 .platform_data = &omap16xx_gpio2_config, 139 }, 140 .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources), 141 .resource = omap16xx_gpio2_resources, 142 }; 143 144 /* gpio3 */ 145 static struct __initdata resource omap16xx_gpio3_resources[] = { 146 { 147 .start = OMAP1610_GPIO3_BASE, 148 .end = OMAP1610_GPIO3_BASE + SZ_2K - 1, 149 .flags = IORESOURCE_MEM, 150 }, 151 { 152 .start = INT_1610_GPIO_BANK3, 153 .flags = IORESOURCE_IRQ, 154 }, 155 }; 156 157 static struct __initdata omap_gpio_platform_data omap16xx_gpio3_config = { 158 .bank_width = 16, 159 .regs = &omap16xx_gpio_regs, 160 }; 161 162 static struct platform_device omap16xx_gpio3 = { 163 .name = "omap_gpio", 164 .id = 3, 165 .dev = { 166 .platform_data = &omap16xx_gpio3_config, 167 }, 168 .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources), 169 .resource = omap16xx_gpio3_resources, 170 }; 171 172 /* gpio4 */ 173 static struct __initdata resource omap16xx_gpio4_resources[] = { 174 { 175 .start = OMAP1610_GPIO4_BASE, 176 .end = OMAP1610_GPIO4_BASE + SZ_2K - 1, 177 .flags = IORESOURCE_MEM, 178 }, 179 { 180 .start = INT_1610_GPIO_BANK4, 181 .flags = IORESOURCE_IRQ, 182 }, 183 }; 184 185 static struct __initdata omap_gpio_platform_data omap16xx_gpio4_config = { 186 .bank_width = 16, 187 .regs = &omap16xx_gpio_regs, 188 }; 189 190 static struct platform_device omap16xx_gpio4 = { 191 .name = "omap_gpio", 192 .id = 4, 193 .dev = { 194 .platform_data = &omap16xx_gpio4_config, 195 }, 196 .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources), 197 .resource = omap16xx_gpio4_resources, 198 }; 199 200 static struct __initdata platform_device * omap16xx_gpio_dev[] = { 201 &omap16xx_mpu_gpio, 202 &omap16xx_gpio1, 203 &omap16xx_gpio2, 204 &omap16xx_gpio3, 205 &omap16xx_gpio4, 206 }; 207 208 /* 209 * omap16xx_gpio_init needs to be done before 210 * machine_init functions access gpio APIs. 211 * Hence omap16xx_gpio_init is a postcore_initcall. 212 */ 213 static int __init omap16xx_gpio_init(void) 214 { 215 int i; 216 void __iomem *base; 217 struct resource *res; 218 struct platform_device *pdev; 219 struct omap_gpio_platform_data *pdata; 220 221 if (!cpu_is_omap16xx()) 222 return -EINVAL; 223 224 /* 225 * Enable system clock for GPIO module. 226 * The CAM_CLK_CTRL *is* really the right place. 227 */ 228 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, 229 ULPD_CAM_CLK_CTRL); 230 231 for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) { 232 pdev = omap16xx_gpio_dev[i]; 233 pdata = pdev->dev.platform_data; 234 235 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 236 if (unlikely(!res)) { 237 dev_err(&pdev->dev, "Invalid mem resource.\n"); 238 return -ENODEV; 239 } 240 241 base = ioremap(res->start, resource_size(res)); 242 if (unlikely(!base)) { 243 dev_err(&pdev->dev, "ioremap failed.\n"); 244 return -ENOMEM; 245 } 246 247 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG); 248 iounmap(base); 249 250 platform_device_register(omap16xx_gpio_dev[i]); 251 } 252 253 return 0; 254 } 255 postcore_initcall(omap16xx_gpio_init); 256