| 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 | |
| 33 | static 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 | */ |
| 152 | static 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 | } |
| 160 | omap_postcore_initcall(omap2_gpio_init); |