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