xref: /openbmc/linux/arch/arm/mach-omap1/gpio16xx.c (revision e8f6f3b4)
1 /*
2  * OMAP16xx 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 #include <linux/platform_data/gpio-omap.h>
21 
22 #include <mach/irqs.h>
23 
24 #define OMAP1610_GPIO1_BASE		0xfffbe400
25 #define OMAP1610_GPIO2_BASE		0xfffbec00
26 #define OMAP1610_GPIO3_BASE		0xfffbb400
27 #define OMAP1610_GPIO4_BASE		0xfffbbc00
28 #define OMAP1_MPUIO_VBASE		OMAP1_MPUIO_BASE
29 
30 /* smart idle, enable wakeup */
31 #define SYSCONFIG_WORD			0x14
32 
33 /* mpu gpio */
34 static struct resource omap16xx_mpu_gpio_resources[] = {
35 	{
36 		.start	= OMAP1_MPUIO_VBASE,
37 		.end	= OMAP1_MPUIO_VBASE + SZ_2K - 1,
38 		.flags	= IORESOURCE_MEM,
39 	},
40 	{
41 		.start	= INT_MPUIO,
42 		.flags	= IORESOURCE_IRQ,
43 	},
44 };
45 
46 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
47 	.revision       = USHRT_MAX,
48 	.direction	= OMAP_MPUIO_IO_CNTL,
49 	.datain		= OMAP_MPUIO_INPUT_LATCH,
50 	.dataout	= OMAP_MPUIO_OUTPUT,
51 	.irqstatus	= OMAP_MPUIO_GPIO_INT,
52 	.irqenable	= OMAP_MPUIO_GPIO_MASKIT,
53 	.irqenable_inv	= true,
54 	.irqctrl	= OMAP_MPUIO_GPIO_INT_EDGE,
55 };
56 
57 static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = {
58 	.is_mpuio		= true,
59 	.bank_width		= 16,
60 	.bank_stride		= 1,
61 	.regs                   = &omap16xx_mpuio_regs,
62 };
63 
64 static struct platform_device omap16xx_mpu_gpio = {
65 	.name           = "omap_gpio",
66 	.id             = 0,
67 	.dev            = {
68 		.platform_data = &omap16xx_mpu_gpio_config,
69 	},
70 	.num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
71 	.resource = omap16xx_mpu_gpio_resources,
72 };
73 
74 /* gpio1 */
75 static struct resource omap16xx_gpio1_resources[] = {
76 	{
77 		.start	= OMAP1610_GPIO1_BASE,
78 		.end	= OMAP1610_GPIO1_BASE + SZ_2K - 1,
79 		.flags	= IORESOURCE_MEM,
80 	},
81 	{
82 		.start	= INT_GPIO_BANK1,
83 		.flags	= IORESOURCE_IRQ,
84 	},
85 };
86 
87 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
88 	.revision       = OMAP1610_GPIO_REVISION,
89 	.direction	= OMAP1610_GPIO_DIRECTION,
90 	.set_dataout	= OMAP1610_GPIO_SET_DATAOUT,
91 	.clr_dataout	= OMAP1610_GPIO_CLEAR_DATAOUT,
92 	.datain		= OMAP1610_GPIO_DATAIN,
93 	.dataout	= OMAP1610_GPIO_DATAOUT,
94 	.irqstatus	= OMAP1610_GPIO_IRQSTATUS1,
95 	.irqenable	= OMAP1610_GPIO_IRQENABLE1,
96 	.set_irqenable	= OMAP1610_GPIO_SET_IRQENABLE1,
97 	.clr_irqenable	= OMAP1610_GPIO_CLEAR_IRQENABLE1,
98 	.wkup_en	= OMAP1610_GPIO_WAKEUPENABLE,
99 	.edgectrl1	= OMAP1610_GPIO_EDGE_CTRL1,
100 	.edgectrl2	= OMAP1610_GPIO_EDGE_CTRL2,
101 };
102 
103 static struct omap_gpio_platform_data omap16xx_gpio1_config = {
104 	.bank_width		= 16,
105 	.regs                   = &omap16xx_gpio_regs,
106 };
107 
108 static struct platform_device omap16xx_gpio1 = {
109 	.name           = "omap_gpio",
110 	.id             = 1,
111 	.dev            = {
112 		.platform_data = &omap16xx_gpio1_config,
113 	},
114 	.num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
115 	.resource = omap16xx_gpio1_resources,
116 };
117 
118 /* gpio2 */
119 static struct resource omap16xx_gpio2_resources[] = {
120 	{
121 		.start	= OMAP1610_GPIO2_BASE,
122 		.end	= OMAP1610_GPIO2_BASE + SZ_2K - 1,
123 		.flags	= IORESOURCE_MEM,
124 	},
125 	{
126 		.start	= INT_1610_GPIO_BANK2,
127 		.flags	= IORESOURCE_IRQ,
128 	},
129 };
130 
131 static struct omap_gpio_platform_data omap16xx_gpio2_config = {
132 	.bank_width		= 16,
133 	.regs                   = &omap16xx_gpio_regs,
134 };
135 
136 static struct platform_device omap16xx_gpio2 = {
137 	.name           = "omap_gpio",
138 	.id             = 2,
139 	.dev            = {
140 		.platform_data = &omap16xx_gpio2_config,
141 	},
142 	.num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
143 	.resource = omap16xx_gpio2_resources,
144 };
145 
146 /* gpio3 */
147 static struct resource omap16xx_gpio3_resources[] = {
148 	{
149 		.start	= OMAP1610_GPIO3_BASE,
150 		.end	= OMAP1610_GPIO3_BASE + SZ_2K - 1,
151 		.flags	= IORESOURCE_MEM,
152 	},
153 	{
154 		.start	= INT_1610_GPIO_BANK3,
155 		.flags	= IORESOURCE_IRQ,
156 	},
157 };
158 
159 static struct omap_gpio_platform_data omap16xx_gpio3_config = {
160 	.bank_width		= 16,
161 	.regs                   = &omap16xx_gpio_regs,
162 };
163 
164 static struct platform_device omap16xx_gpio3 = {
165 	.name           = "omap_gpio",
166 	.id             = 3,
167 	.dev            = {
168 		.platform_data = &omap16xx_gpio3_config,
169 	},
170 	.num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
171 	.resource = omap16xx_gpio3_resources,
172 };
173 
174 /* gpio4 */
175 static struct resource omap16xx_gpio4_resources[] = {
176 	{
177 		.start	= OMAP1610_GPIO4_BASE,
178 		.end	= OMAP1610_GPIO4_BASE + SZ_2K - 1,
179 		.flags	= IORESOURCE_MEM,
180 	},
181 	{
182 		.start	= INT_1610_GPIO_BANK4,
183 		.flags	= IORESOURCE_IRQ,
184 	},
185 };
186 
187 static struct omap_gpio_platform_data omap16xx_gpio4_config = {
188 	.bank_width		= 16,
189 	.regs                   = &omap16xx_gpio_regs,
190 };
191 
192 static struct platform_device omap16xx_gpio4 = {
193 	.name           = "omap_gpio",
194 	.id             = 4,
195 	.dev            = {
196 		.platform_data = &omap16xx_gpio4_config,
197 	},
198 	.num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
199 	.resource = omap16xx_gpio4_resources,
200 };
201 
202 static struct platform_device *omap16xx_gpio_dev[] __initdata = {
203 	&omap16xx_mpu_gpio,
204 	&omap16xx_gpio1,
205 	&omap16xx_gpio2,
206 	&omap16xx_gpio3,
207 	&omap16xx_gpio4,
208 };
209 
210 /*
211  * omap16xx_gpio_init needs to be done before
212  * machine_init functions access gpio APIs.
213  * Hence omap16xx_gpio_init is a postcore_initcall.
214  */
215 static int __init omap16xx_gpio_init(void)
216 {
217 	int i;
218 	void __iomem *base;
219 	struct resource *res;
220 	struct platform_device *pdev;
221 	struct omap_gpio_platform_data *pdata;
222 
223 	if (!cpu_is_omap16xx())
224 		return -EINVAL;
225 
226 	/*
227 	 * Enable system clock for GPIO module.
228 	 * The CAM_CLK_CTRL *is* really the right place.
229 	 */
230 	omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
231 					ULPD_CAM_CLK_CTRL);
232 
233 	for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
234 		pdev = omap16xx_gpio_dev[i];
235 		pdata = pdev->dev.platform_data;
236 
237 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
238 		if (unlikely(!res)) {
239 			dev_err(&pdev->dev, "Invalid mem resource.\n");
240 			return -ENODEV;
241 		}
242 
243 		base = ioremap(res->start, resource_size(res));
244 		if (unlikely(!base)) {
245 			dev_err(&pdev->dev, "ioremap failed.\n");
246 			return -ENOMEM;
247 		}
248 
249 		__raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
250 		iounmap(base);
251 
252 		platform_device_register(omap16xx_gpio_dev[i]);
253 	}
254 
255 	return 0;
256 }
257 postcore_initcall(omap16xx_gpio_init);
258