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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>
Benoit Coussone3e5a922011-08-16 11:51:54 +020023#include <linux/of.h>
Tony Lindgren4b254082012-08-30 15:37:24 -070024#include <linux/platform_data/gpio-omap.h>
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080025
26#include <plat/omap_hwmod.h>
27#include <plat/omap_device.h>
Tarun Kanti DebBarma60a34372011-09-29 04:47:25 +053028#include <plat/omap-pm.h>
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080029
Charulatha V0cde8d02011-05-05 20:15:16 +053030#include "powerdomain.h"
31
Kevin Hilman9cf793f2012-02-20 09:43:30 -080032static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080033{
Kevin Hilman3528c582011-07-21 13:48:45 -070034 struct platform_device *pdev;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080035 struct omap_gpio_platform_data *pdata;
36 struct omap_gpio_dev_attr *dev_attr;
37 char *name = "omap_gpio";
38 int id;
Charulatha V0cde8d02011-05-05 20:15:16 +053039 struct powerdomain *pwrdm;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080040
41 /*
42 * extract the device id from name field available in the
43 * hwmod database and use the same for constructing ids for
44 * gpio devices.
45 * CAUTION: Make sure the name in the hwmod database does
46 * not change. If changed, make corresponding change here
47 * or make use of static variable mechanism to handle this.
48 */
49 sscanf(oh->name, "gpio%d", &id);
50
51 pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
52 if (!pdata) {
53 pr_err("gpio%d: Memory allocation failed\n", id);
54 return -ENOMEM;
55 }
56
57 dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
58 pdata->bank_width = dev_attr->bank_width;
59 pdata->dbck_flag = dev_attr->dbck_flag;
Tarun Kanti DebBarma60a34372011-09-29 04:47:25 +053060 pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070061 pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
Paul Walmsleyeeb37112012-04-13 06:34:32 -060062 if (!pdata->regs) {
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070063 pr_err("gpio%d: Memory allocation failed\n", id);
Wei Yongjun5e40b1c2012-09-03 20:42:27 +080064 kfree(pdata);
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070065 return -ENOMEM;
66 }
67
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080068 switch (oh->class->rev) {
69 case 0:
Charulatha V803a2432011-05-05 17:04:12 +053070 if (id == 1)
71 /* non-wakeup GPIO pins for OMAP2 Bank1 */
72 pdata->non_wakeup_gpios = 0xe203ffc0;
73 else if (id == 2)
74 /* non-wakeup GPIO pins for OMAP2 Bank2 */
75 pdata->non_wakeup_gpios = 0x08700040;
76 /* fall through */
77
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080078 case 1:
Kevin Hilmane5ff4442011-04-22 14:37:16 -070079 pdata->regs->revision = OMAP24XX_GPIO_REVISION;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070080 pdata->regs->direction = OMAP24XX_GPIO_OE;
81 pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
82 pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
83 pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
84 pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
Kevin Hilmaneef4bec2011-04-21 09:17:35 -070085 pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
86 pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -070087 pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
Tarun Kanti DebBarmaae10f232011-08-30 15:24:27 +053088 pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -070089 pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
90 pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
Kevin Hilman9942da02011-04-22 12:02:05 -070091 pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
92 pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
Charulatha Vc8eef652011-05-02 15:21:42 +053093 pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
Tarun Kanti DebBarma6ed87c52011-09-13 14:41:44 +053094 pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
Tarun Kanti DebBarma9ea14d82011-08-30 15:05:44 +053095 pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
96 pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
97 pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
98 pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080099 break;
100 case 2:
Kevin Hilmane5ff4442011-04-22 14:37:16 -0700101 pdata->regs->revision = OMAP4_GPIO_REVISION;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -0700102 pdata->regs->direction = OMAP4_GPIO_OE;
103 pdata->regs->datain = OMAP4_GPIO_DATAIN;
104 pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
105 pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
106 pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
Tarun Kanti DebBarma4e962e82012-04-27 19:43:37 +0530107 pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
108 pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
Kevin Hilmaneef4bec2011-04-21 09:17:35 -0700109 pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
110 pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -0700111 pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
Tarun Kanti DebBarmaae10f232011-08-30 15:24:27 +0530112 pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -0700113 pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
114 pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
Kevin Hilman9942da02011-04-22 12:02:05 -0700115 pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
116 pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
Charulatha Vc8eef652011-05-02 15:21:42 +0530117 pdata->regs->ctrl = OMAP4_GPIO_CTRL;
Tarun Kanti DebBarma6ed87c52011-09-13 14:41:44 +0530118 pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
Tarun Kanti DebBarma9ea14d82011-08-30 15:05:44 +0530119 pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
120 pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
121 pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
122 pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800123 break;
124 default:
125 WARN(1, "Invalid gpio bank_type\n");
Wei Yongjun5e40b1c2012-09-03 20:42:27 +0800126 kfree(pdata->regs);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800127 kfree(pdata);
128 return -EINVAL;
129 }
130
Charulatha V0cde8d02011-05-05 20:15:16 +0530131 pwrdm = omap_hwmod_get_pwrdm(oh);
132 pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
133
Kevin Hilman3528c582011-07-21 13:48:45 -0700134 pdev = omap_device_build(name, id - 1, oh, pdata,
Benoit Coussonf718e2c2011-08-10 15:30:09 +0200135 sizeof(*pdata), NULL, 0, false);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800136 kfree(pdata);
137
Kevin Hilman3528c582011-07-21 13:48:45 -0700138 if (IS_ERR(pdev)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300139 WARN(1, "Can't build omap_device for %s:%s.\n",
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800140 name, oh->name);
Kevin Hilman3528c582011-07-21 13:48:45 -0700141 return PTR_ERR(pdev);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800142 }
143
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800144 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 postcore_initcall.
151 */
152static int __init omap2_gpio_init(void)
153{
Benoit Coussone3e5a922011-08-16 11:51:54 +0200154 /* 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);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800159}
160postcore_initcall(omap2_gpio_init);