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Varadarajan, Charulathaf5471702010-12-07 16:26:57 -08001/*
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>
Tarun Kanti DebBarma60a34372011-09-29 04:47:25 +053026#include <plat/omap-pm.h>
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080027
Charulatha V0cde8d02011-05-05 20:15:16 +053028#include "powerdomain.h"
29
Kevin Hilman9cf793f2012-02-20 09:43:30 -080030static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080031{
Kevin Hilman3528c582011-07-21 13:48:45 -070032 struct platform_device *pdev;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080033 struct omap_gpio_platform_data *pdata;
34 struct omap_gpio_dev_attr *dev_attr;
35 char *name = "omap_gpio";
36 int id;
Charulatha V0cde8d02011-05-05 20:15:16 +053037 struct powerdomain *pwrdm;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080038
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;
Tarun Kanti DebBarma60a34372011-09-29 04:47:25 +053058 pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070059 pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
60 if (!pdata) {
61 pr_err("gpio%d: Memory allocation failed\n", id);
62 return -ENOMEM;
63 }
64
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080065 switch (oh->class->rev) {
66 case 0:
Charulatha V803a2432011-05-05 17:04:12 +053067 if (id == 1)
68 /* non-wakeup GPIO pins for OMAP2 Bank1 */
69 pdata->non_wakeup_gpios = 0xe203ffc0;
70 else if (id == 2)
71 /* non-wakeup GPIO pins for OMAP2 Bank2 */
72 pdata->non_wakeup_gpios = 0x08700040;
73 /* fall through */
74
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080075 case 1:
Kevin Hilmane5ff4442011-04-22 14:37:16 -070076 pdata->regs->revision = OMAP24XX_GPIO_REVISION;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070077 pdata->regs->direction = OMAP24XX_GPIO_OE;
78 pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
79 pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
80 pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
81 pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
Kevin Hilmaneef4bec2011-04-21 09:17:35 -070082 pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
83 pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -070084 pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
Tarun Kanti DebBarmaae10f232011-08-30 15:24:27 +053085 pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -070086 pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
87 pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
Kevin Hilman9942da02011-04-22 12:02:05 -070088 pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
89 pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
Charulatha Vc8eef652011-05-02 15:21:42 +053090 pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
Tarun Kanti DebBarma6ed87c52011-09-13 14:41:44 +053091 pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
Tarun Kanti DebBarma9ea14d82011-08-30 15:05:44 +053092 pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
93 pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
94 pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
95 pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080096 break;
97 case 2:
Kevin Hilmane5ff4442011-04-22 14:37:16 -070098 pdata->regs->revision = OMAP4_GPIO_REVISION;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070099 pdata->regs->direction = OMAP4_GPIO_OE;
100 pdata->regs->datain = OMAP4_GPIO_DATAIN;
101 pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
102 pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
103 pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
Tarun Kanti DebBarma4e962e82012-04-27 19:43:37 +0530104 pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
105 pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
Kevin Hilmaneef4bec2011-04-21 09:17:35 -0700106 pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
107 pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -0700108 pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
Tarun Kanti DebBarmaae10f232011-08-30 15:24:27 +0530109 pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -0700110 pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
111 pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
Kevin Hilman9942da02011-04-22 12:02:05 -0700112 pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
113 pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
Charulatha Vc8eef652011-05-02 15:21:42 +0530114 pdata->regs->ctrl = OMAP4_GPIO_CTRL;
Tarun Kanti DebBarma6ed87c52011-09-13 14:41:44 +0530115 pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
Tarun Kanti DebBarma9ea14d82011-08-30 15:05:44 +0530116 pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
117 pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
118 pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
119 pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800120 break;
121 default:
122 WARN(1, "Invalid gpio bank_type\n");
123 kfree(pdata);
124 return -EINVAL;
125 }
126
Charulatha V0cde8d02011-05-05 20:15:16 +0530127 pwrdm = omap_hwmod_get_pwrdm(oh);
128 pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
129
Kevin Hilman3528c582011-07-21 13:48:45 -0700130 pdev = omap_device_build(name, id - 1, oh, pdata,
Benoit Coussonf718e2c2011-08-10 15:30:09 +0200131 sizeof(*pdata), NULL, 0, false);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800132 kfree(pdata);
133
Kevin Hilman3528c582011-07-21 13:48:45 -0700134 if (IS_ERR(pdev)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300135 WARN(1, "Can't build omap_device for %s:%s.\n",
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800136 name, oh->name);
Kevin Hilman3528c582011-07-21 13:48:45 -0700137 return PTR_ERR(pdev);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800138 }
139
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800140 return 0;
141}
142
143/*
144 * gpio_init needs to be done before
145 * machine_init functions access gpio APIs.
146 * Hence gpio_init is a postcore_initcall.
147 */
148static int __init omap2_gpio_init(void)
149{
150 return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init,
151 NULL);
152}
153postcore_initcall(omap2_gpio_init);