1/* 2 * OMAP2+ specific gpio initialization 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/err.h> 21#include <linux/slab.h> 22#include <linux/interrupt.h> 23#include <linux/of.h> 24#include <linux/platform_data/gpio-omap.h> 25 26#include "soc.h" 27#include "omap_hwmod.h" 28#include "omap_device.h" 29#include "omap-pm.h" 30 31#include "powerdomain.h" 32 33static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) 34{ 35 struct platform_device *pdev; 36 struct omap_gpio_platform_data *pdata; 37 struct omap_gpio_dev_attr *dev_attr; 38 char *name = "omap_gpio"; 39 int id; 40 struct powerdomain *pwrdm; 41 42 /* 43 * extract the device id from name field available in the 44 * hwmod database and use the same for constructing ids for 45 * gpio devices. 46 * CAUTION: Make sure the name in the hwmod database does 47 * not change. If changed, make corresponding change here 48 * or make use of static variable mechanism to handle this. 49 */ 50 sscanf(oh->name, "gpio%d", &id); 51 52 pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL); 53 if (!pdata) { 54 pr_err("gpio%d: Memory allocation failed\n", id); 55 return -ENOMEM; 56 } 57 58 dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr; 59 pdata->bank_width = dev_attr->bank_width; 60 pdata->dbck_flag = dev_attr->dbck_flag; 61 pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count; 62 pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL); 63 if (!pdata->regs) { 64 pr_err("gpio%d: Memory allocation failed\n", id); 65 kfree(pdata); 66 return -ENOMEM; 67 } 68 69 switch (oh->class->rev) { 70 case 0: 71 if (id == 1) 72 /* non-wakeup GPIO pins for OMAP2 Bank1 */ 73 pdata->non_wakeup_gpios = 0xe203ffc0; 74 else if (id == 2) 75 /* non-wakeup GPIO pins for OMAP2 Bank2 */ 76 pdata->non_wakeup_gpios = 0x08700040; 77 /* fall through */ 78 79 case 1: 80 pdata->regs->revision = OMAP24XX_GPIO_REVISION; 81 pdata->regs->direction = OMAP24XX_GPIO_OE; 82 pdata->regs->datain = OMAP24XX_GPIO_DATAIN; 83 pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT; 84 pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT; 85 pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT; 86 pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1; 87 pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2; 88 pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1; 89 pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2; 90 pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1; 91 pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1; 92 pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL; 93 pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN; 94 pdata->regs->ctrl = OMAP24XX_GPIO_CTRL; 95 pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN; 96 pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0; 97 pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1; 98 pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT; 99 pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT; 100 break; 101 case 2: 102 pdata->regs->revision = OMAP4_GPIO_REVISION; 103 pdata->regs->direction = OMAP4_GPIO_OE; 104 pdata->regs->datain = OMAP4_GPIO_DATAIN; 105 pdata->regs->dataout = OMAP4_GPIO_DATAOUT; 106 pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT; 107 pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT; 108 pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0; 109 pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1; 110 pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0; 111 pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1; 112 pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0; 113 pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1; 114 pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0; 115 pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0; 116 pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME; 117 pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE; 118 pdata->regs->ctrl = OMAP4_GPIO_CTRL; 119 pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0; 120 pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0; 121 pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1; 122 pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT; 123 pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT; 124 break; 125 default: 126 WARN(1, "Invalid gpio bank_type\n"); 127 kfree(pdata->regs); 128 kfree(pdata); 129 return -EINVAL; 130 } 131 132 pwrdm = omap_hwmod_get_pwrdm(oh); 133 pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm); 134 135 pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata)); 136 kfree(pdata); 137 138 if (IS_ERR(pdev)) { 139 WARN(1, "Can't build omap_device for %s:%s.\n", 140 name, oh->name); 141 return PTR_ERR(pdev); 142 } 143 144 return 0; 145} 146 147/* 148 * gpio_init needs to be done before 149 * machine_init functions access gpio APIs. 150 * Hence gpio_init is a omap_postcore_initcall. 151 */ 152static int __init omap2_gpio_init(void) 153{ 154 /* If dtb is there, the devices will be created dynamically */ 155 if (of_have_populated_dt()) 156 return -ENODEV; 157 158 return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL); 159} 160omap_postcore_initcall(omap2_gpio_init); 161