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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
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080030static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
31{
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;
58 pdata->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1);
Tarun Kanti DebBarma60a34372011-09-29 04:47:25 +053059 pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070060 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
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080066 switch (oh->class->rev) {
67 case 0:
Charulatha V803a2432011-05-05 17:04:12 +053068 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
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080076 case 1:
77 pdata->bank_type = METHOD_GPIO_24XX;
Kevin Hilmane5ff4442011-04-22 14:37:16 -070078 pdata->regs->revision = OMAP24XX_GPIO_REVISION;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070079 pdata->regs->direction = OMAP24XX_GPIO_OE;
80 pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
81 pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
82 pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
83 pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
Kevin Hilmaneef4bec2011-04-21 09:17:35 -070084 pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
85 pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -070086 pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
87 pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
88 pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
Kevin Hilman9942da02011-04-22 12:02:05 -070089 pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
90 pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
Charulatha Vc8eef652011-05-02 15:21:42 +053091 pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -080092 break;
93 case 2:
94 pdata->bank_type = METHOD_GPIO_44XX;
Kevin Hilmane5ff4442011-04-22 14:37:16 -070095 pdata->regs->revision = OMAP4_GPIO_REVISION;
Kevin Hilmanfa87931a2011-04-20 16:31:23 -070096 pdata->regs->direction = OMAP4_GPIO_OE;
97 pdata->regs->datain = OMAP4_GPIO_DATAIN;
98 pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
99 pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
100 pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
Kevin Hilmaneef4bec2011-04-21 09:17:35 -0700101 pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
102 pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
Kevin Hilman28f3b5a2011-04-21 09:53:06 -0700103 pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
104 pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
105 pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
Kevin Hilman9942da02011-04-22 12:02:05 -0700106 pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
107 pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
Charulatha Vc8eef652011-05-02 15:21:42 +0530108 pdata->regs->ctrl = OMAP4_GPIO_CTRL;
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800109 break;
110 default:
111 WARN(1, "Invalid gpio bank_type\n");
112 kfree(pdata);
113 return -EINVAL;
114 }
115
Charulatha V0cde8d02011-05-05 20:15:16 +0530116 pwrdm = omap_hwmod_get_pwrdm(oh);
117 pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
118
Kevin Hilman3528c582011-07-21 13:48:45 -0700119 pdev = omap_device_build(name, id - 1, oh, pdata,
Benoit Coussonf718e2c2011-08-10 15:30:09 +0200120 sizeof(*pdata), NULL, 0, false);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800121 kfree(pdata);
122
Kevin Hilman3528c582011-07-21 13:48:45 -0700123 if (IS_ERR(pdev)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300124 WARN(1, "Can't build omap_device for %s:%s.\n",
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800125 name, oh->name);
Kevin Hilman3528c582011-07-21 13:48:45 -0700126 return PTR_ERR(pdev);
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800127 }
128
Kevin Hilman9f8b6942011-08-01 09:33:13 -0700129 omap_device_disable_idle_on_suspend(pdev);
Kevin Hilmanc8c9fda2011-07-12 22:48:42 +0200130
Varadarajan, Charulathaf5471702010-12-07 16:26:57 -0800131 return 0;
132}
133
134/*
135 * gpio_init needs to be done before
136 * machine_init functions access gpio APIs.
137 * Hence gpio_init is a postcore_initcall.
138 */
139static int __init omap2_gpio_init(void)
140{
141 return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init,
142 NULL);
143}
144postcore_initcall(omap2_gpio_init);