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 #include <mach/irqs.h> 23 24 #define OMAP1610_GPIO1_BASE 0xfffbe400 25 #define OMAP1610_GPIO2_BASE 0xfffbec00 26 #define OMAP1610_GPIO3_BASE 0xfffbb400 27 #define OMAP1610_GPIO4_BASE 0xfffbbc00 28 #define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE 29 30 /* smart idle, enable wakeup */ 31 #define SYSCONFIG_WORD 0x14 32 33 /* mpu gpio */ 34 static struct resource omap16xx_mpu_gpio_resources[] = { 35 { 36 .start = OMAP1_MPUIO_VBASE, 37 .end = OMAP1_MPUIO_VBASE + SZ_2K - 1, 38 .flags = IORESOURCE_MEM, 39 }, 40 { 41 .start = INT_MPUIO, 42 .flags = IORESOURCE_IRQ, 43 }, 44 }; 45 46 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = { 47 .revision = USHRT_MAX, 48 .direction = OMAP_MPUIO_IO_CNTL, 49 .datain = OMAP_MPUIO_INPUT_LATCH, 50 .dataout = OMAP_MPUIO_OUTPUT, 51 .irqstatus = OMAP_MPUIO_GPIO_INT, 52 .irqenable = OMAP_MPUIO_GPIO_MASKIT, 53 .irqenable_inv = true, 54 .irqctrl = OMAP_MPUIO_GPIO_INT_EDGE, 55 }; 56 57 static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = { 58 .is_mpuio = true, 59 .bank_width = 16, 60 .bank_stride = 1, 61 .regs = &omap16xx_mpuio_regs, 62 }; 63 64 static struct platform_device omap16xx_mpu_gpio = { 65 .name = "omap_gpio", 66 .id = 0, 67 .dev = { 68 .platform_data = &omap16xx_mpu_gpio_config, 69 }, 70 .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources), 71 .resource = omap16xx_mpu_gpio_resources, 72 }; 73 74 /* gpio1 */ 75 static struct resource omap16xx_gpio1_resources[] = { 76 { 77 .start = OMAP1610_GPIO1_BASE, 78 .end = OMAP1610_GPIO1_BASE + SZ_2K - 1, 79 .flags = IORESOURCE_MEM, 80 }, 81 { 82 .start = INT_GPIO_BANK1, 83 .flags = IORESOURCE_IRQ, 84 }, 85 }; 86 87 static struct omap_gpio_reg_offs omap16xx_gpio_regs = { 88 .revision = OMAP1610_GPIO_REVISION, 89 .direction = OMAP1610_GPIO_DIRECTION, 90 .set_dataout = OMAP1610_GPIO_SET_DATAOUT, 91 .clr_dataout = OMAP1610_GPIO_CLEAR_DATAOUT, 92 .datain = OMAP1610_GPIO_DATAIN, 93 .dataout = OMAP1610_GPIO_DATAOUT, 94 .irqstatus = OMAP1610_GPIO_IRQSTATUS1, 95 .irqenable = OMAP1610_GPIO_IRQENABLE1, 96 .set_irqenable = OMAP1610_GPIO_SET_IRQENABLE1, 97 .clr_irqenable = OMAP1610_GPIO_CLEAR_IRQENABLE1, 98 .wkup_en = OMAP1610_GPIO_WAKEUPENABLE, 99 .edgectrl1 = OMAP1610_GPIO_EDGE_CTRL1, 100 .edgectrl2 = OMAP1610_GPIO_EDGE_CTRL2, 101 }; 102 103 static struct omap_gpio_platform_data omap16xx_gpio1_config = { 104 .bank_width = 16, 105 .regs = &omap16xx_gpio_regs, 106 }; 107 108 static struct platform_device omap16xx_gpio1 = { 109 .name = "omap_gpio", 110 .id = 1, 111 .dev = { 112 .platform_data = &omap16xx_gpio1_config, 113 }, 114 .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources), 115 .resource = omap16xx_gpio1_resources, 116 }; 117 118 /* gpio2 */ 119 static struct resource omap16xx_gpio2_resources[] = { 120 { 121 .start = OMAP1610_GPIO2_BASE, 122 .end = OMAP1610_GPIO2_BASE + SZ_2K - 1, 123 .flags = IORESOURCE_MEM, 124 }, 125 { 126 .start = INT_1610_GPIO_BANK2, 127 .flags = IORESOURCE_IRQ, 128 }, 129 }; 130 131 static struct omap_gpio_platform_data omap16xx_gpio2_config = { 132 .bank_width = 16, 133 .regs = &omap16xx_gpio_regs, 134 }; 135 136 static struct platform_device omap16xx_gpio2 = { 137 .name = "omap_gpio", 138 .id = 2, 139 .dev = { 140 .platform_data = &omap16xx_gpio2_config, 141 }, 142 .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources), 143 .resource = omap16xx_gpio2_resources, 144 }; 145 146 /* gpio3 */ 147 static struct resource omap16xx_gpio3_resources[] = { 148 { 149 .start = OMAP1610_GPIO3_BASE, 150 .end = OMAP1610_GPIO3_BASE + SZ_2K - 1, 151 .flags = IORESOURCE_MEM, 152 }, 153 { 154 .start = INT_1610_GPIO_BANK3, 155 .flags = IORESOURCE_IRQ, 156 }, 157 }; 158 159 static struct omap_gpio_platform_data omap16xx_gpio3_config = { 160 .bank_width = 16, 161 .regs = &omap16xx_gpio_regs, 162 }; 163 164 static struct platform_device omap16xx_gpio3 = { 165 .name = "omap_gpio", 166 .id = 3, 167 .dev = { 168 .platform_data = &omap16xx_gpio3_config, 169 }, 170 .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources), 171 .resource = omap16xx_gpio3_resources, 172 }; 173 174 /* gpio4 */ 175 static struct resource omap16xx_gpio4_resources[] = { 176 { 177 .start = OMAP1610_GPIO4_BASE, 178 .end = OMAP1610_GPIO4_BASE + SZ_2K - 1, 179 .flags = IORESOURCE_MEM, 180 }, 181 { 182 .start = INT_1610_GPIO_BANK4, 183 .flags = IORESOURCE_IRQ, 184 }, 185 }; 186 187 static struct omap_gpio_platform_data omap16xx_gpio4_config = { 188 .bank_width = 16, 189 .regs = &omap16xx_gpio_regs, 190 }; 191 192 static struct platform_device omap16xx_gpio4 = { 193 .name = "omap_gpio", 194 .id = 4, 195 .dev = { 196 .platform_data = &omap16xx_gpio4_config, 197 }, 198 .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources), 199 .resource = omap16xx_gpio4_resources, 200 }; 201 202 static struct platform_device *omap16xx_gpio_dev[] __initdata = { 203 &omap16xx_mpu_gpio, 204 &omap16xx_gpio1, 205 &omap16xx_gpio2, 206 &omap16xx_gpio3, 207 &omap16xx_gpio4, 208 }; 209 210 /* 211 * omap16xx_gpio_init needs to be done before 212 * machine_init functions access gpio APIs. 213 * Hence omap16xx_gpio_init is a postcore_initcall. 214 */ 215 static int __init omap16xx_gpio_init(void) 216 { 217 int i; 218 void __iomem *base; 219 struct resource *res; 220 struct platform_device *pdev; 221 struct omap_gpio_platform_data *pdata; 222 223 if (!cpu_is_omap16xx()) 224 return -EINVAL; 225 226 /* 227 * Enable system clock for GPIO module. 228 * The CAM_CLK_CTRL *is* really the right place. 229 */ 230 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, 231 ULPD_CAM_CLK_CTRL); 232 233 for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) { 234 pdev = omap16xx_gpio_dev[i]; 235 pdata = pdev->dev.platform_data; 236 237 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 238 if (unlikely(!res)) { 239 dev_err(&pdev->dev, "Invalid mem resource.\n"); 240 return -ENODEV; 241 } 242 243 base = ioremap(res->start, resource_size(res)); 244 if (unlikely(!base)) { 245 dev_err(&pdev->dev, "ioremap failed.\n"); 246 return -ENOMEM; 247 } 248 249 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG); 250 iounmap(base); 251 252 platform_device_register(omap16xx_gpio_dev[i]); 253 } 254 255 return 0; 256 } 257 postcore_initcall(omap16xx_gpio_init); 258