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1 /*
2  * OMAP15xx specific gpio init
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 
21 #define OMAP1_MPUIO_VBASE		OMAP1_MPUIO_BASE
22 #define OMAP1510_GPIO_BASE		0xFFFCE000
23 
24 /* gpio1 */
25 static struct __initdata resource omap15xx_mpu_gpio_resources[] = {
26 	{
27 		.start	= OMAP1_MPUIO_VBASE,
28 		.end	= OMAP1_MPUIO_VBASE + SZ_2K - 1,
29 		.flags	= IORESOURCE_MEM,
30 	},
31 	{
32 		.start	= INT_MPUIO,
33 		.flags	= IORESOURCE_IRQ,
34 	},
35 };
36 
37 static struct omap_gpio_reg_offs omap15xx_mpuio_regs = {
38 	.revision       = USHRT_MAX,
39 	.direction	= OMAP_MPUIO_IO_CNTL,
40 	.datain		= OMAP_MPUIO_INPUT_LATCH,
41 	.dataout	= OMAP_MPUIO_OUTPUT,
42 	.irqstatus	= OMAP_MPUIO_GPIO_INT,
43 	.irqenable	= OMAP_MPUIO_GPIO_MASKIT,
44 	.irqenable_inv	= true,
45 	.irqctrl	= OMAP_MPUIO_GPIO_INT_EDGE,
46 };
47 
48 static struct __initdata omap_gpio_platform_data omap15xx_mpu_gpio_config = {
49 	.virtual_irq_start	= IH_MPUIO_BASE,
50 	.is_mpuio		= true,
51 	.bank_width		= 16,
52 	.bank_stride		= 1,
53 	.regs			= &omap15xx_mpuio_regs,
54 };
55 
56 static struct platform_device omap15xx_mpu_gpio = {
57 	.name           = "omap_gpio",
58 	.id             = 0,
59 	.dev            = {
60 		.platform_data = &omap15xx_mpu_gpio_config,
61 	},
62 	.num_resources = ARRAY_SIZE(omap15xx_mpu_gpio_resources),
63 	.resource = omap15xx_mpu_gpio_resources,
64 };
65 
66 /* gpio2 */
67 static struct __initdata resource omap15xx_gpio_resources[] = {
68 	{
69 		.start	= OMAP1510_GPIO_BASE,
70 		.end	= OMAP1510_GPIO_BASE + SZ_2K - 1,
71 		.flags	= IORESOURCE_MEM,
72 	},
73 	{
74 		.start	= INT_GPIO_BANK1,
75 		.flags	= IORESOURCE_IRQ,
76 	},
77 };
78 
79 static struct omap_gpio_reg_offs omap15xx_gpio_regs = {
80 	.revision	= USHRT_MAX,
81 	.direction	= OMAP1510_GPIO_DIR_CONTROL,
82 	.datain		= OMAP1510_GPIO_DATA_INPUT,
83 	.dataout	= OMAP1510_GPIO_DATA_OUTPUT,
84 	.irqstatus	= OMAP1510_GPIO_INT_STATUS,
85 	.irqenable	= OMAP1510_GPIO_INT_MASK,
86 	.irqenable_inv	= true,
87 	.irqctrl	= OMAP1510_GPIO_INT_CONTROL,
88 	.pinctrl	= OMAP1510_GPIO_PIN_CONTROL,
89 };
90 
91 static struct __initdata omap_gpio_platform_data omap15xx_gpio_config = {
92 	.virtual_irq_start	= IH_GPIO_BASE,
93 	.bank_width		= 16,
94 	.regs                   = &omap15xx_gpio_regs,
95 };
96 
97 static struct platform_device omap15xx_gpio = {
98 	.name           = "omap_gpio",
99 	.id             = 1,
100 	.dev            = {
101 		.platform_data = &omap15xx_gpio_config,
102 	},
103 	.num_resources = ARRAY_SIZE(omap15xx_gpio_resources),
104 	.resource = omap15xx_gpio_resources,
105 };
106 
107 /*
108  * omap15xx_gpio_init needs to be done before
109  * machine_init functions access gpio APIs.
110  * Hence omap15xx_gpio_init is a postcore_initcall.
111  */
omap15xx_gpio_init(void)112 static int __init omap15xx_gpio_init(void)
113 {
114 	if (!cpu_is_omap15xx())
115 		return -EINVAL;
116 
117 	platform_device_register(&omap15xx_mpu_gpio);
118 	platform_device_register(&omap15xx_gpio);
119 
120 	return 0;
121 }
122 postcore_initcall(omap15xx_gpio_init);
123