GNU Linux-libre 4.19.314-gnu1
[releases.git] / arch / arm / mach-omap1 / gpio16xx.c
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 #include "soc.h"
25
26 #define OMAP1610_GPIO1_BASE             0xfffbe400
27 #define OMAP1610_GPIO2_BASE             0xfffbec00
28 #define OMAP1610_GPIO3_BASE             0xfffbb400
29 #define OMAP1610_GPIO4_BASE             0xfffbbc00
30 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
31
32 /* smart idle, enable wakeup */
33 #define SYSCONFIG_WORD                  0x14
34
35 /* mpu gpio */
36 static struct resource omap16xx_mpu_gpio_resources[] = {
37         {
38                 .start  = OMAP1_MPUIO_VBASE,
39                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
40                 .flags  = IORESOURCE_MEM,
41         },
42         {
43                 .start  = INT_MPUIO,
44                 .flags  = IORESOURCE_IRQ,
45         },
46 };
47
48 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
49         .revision       = USHRT_MAX,
50         .direction      = OMAP_MPUIO_IO_CNTL,
51         .datain         = OMAP_MPUIO_INPUT_LATCH,
52         .dataout        = OMAP_MPUIO_OUTPUT,
53         .irqstatus      = OMAP_MPUIO_GPIO_INT,
54         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
55         .irqenable_inv  = true,
56         .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
57 };
58
59 static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = {
60         .is_mpuio               = true,
61         .bank_width             = 16,
62         .bank_stride            = 1,
63         .regs                   = &omap16xx_mpuio_regs,
64 };
65
66 static struct platform_device omap16xx_mpu_gpio = {
67         .name           = "omap_gpio",
68         .id             = 0,
69         .dev            = {
70                 .platform_data = &omap16xx_mpu_gpio_config,
71         },
72         .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
73         .resource = omap16xx_mpu_gpio_resources,
74 };
75
76 /* gpio1 */
77 static struct resource omap16xx_gpio1_resources[] = {
78         {
79                 .start  = OMAP1610_GPIO1_BASE,
80                 .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
81                 .flags  = IORESOURCE_MEM,
82         },
83         {
84                 .start  = INT_GPIO_BANK1,
85                 .flags  = IORESOURCE_IRQ,
86         },
87 };
88
89 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
90         .revision       = OMAP1610_GPIO_REVISION,
91         .direction      = OMAP1610_GPIO_DIRECTION,
92         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
93         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
94         .datain         = OMAP1610_GPIO_DATAIN,
95         .dataout        = OMAP1610_GPIO_DATAOUT,
96         .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
97         .irqenable      = OMAP1610_GPIO_IRQENABLE1,
98         .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
99         .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
100         .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
101         .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
102         .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
103 };
104
105 static struct omap_gpio_platform_data omap16xx_gpio1_config = {
106         .bank_width             = 16,
107         .regs                   = &omap16xx_gpio_regs,
108 };
109
110 static struct platform_device omap16xx_gpio1 = {
111         .name           = "omap_gpio",
112         .id             = 1,
113         .dev            = {
114                 .platform_data = &omap16xx_gpio1_config,
115         },
116         .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
117         .resource = omap16xx_gpio1_resources,
118 };
119
120 /* gpio2 */
121 static struct resource omap16xx_gpio2_resources[] = {
122         {
123                 .start  = OMAP1610_GPIO2_BASE,
124                 .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
125                 .flags  = IORESOURCE_MEM,
126         },
127         {
128                 .start  = INT_1610_GPIO_BANK2,
129                 .flags  = IORESOURCE_IRQ,
130         },
131 };
132
133 static struct omap_gpio_platform_data omap16xx_gpio2_config = {
134         .bank_width             = 16,
135         .regs                   = &omap16xx_gpio_regs,
136 };
137
138 static struct platform_device omap16xx_gpio2 = {
139         .name           = "omap_gpio",
140         .id             = 2,
141         .dev            = {
142                 .platform_data = &omap16xx_gpio2_config,
143         },
144         .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
145         .resource = omap16xx_gpio2_resources,
146 };
147
148 /* gpio3 */
149 static struct resource omap16xx_gpio3_resources[] = {
150         {
151                 .start  = OMAP1610_GPIO3_BASE,
152                 .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
153                 .flags  = IORESOURCE_MEM,
154         },
155         {
156                 .start  = INT_1610_GPIO_BANK3,
157                 .flags  = IORESOURCE_IRQ,
158         },
159 };
160
161 static struct omap_gpio_platform_data omap16xx_gpio3_config = {
162         .bank_width             = 16,
163         .regs                   = &omap16xx_gpio_regs,
164 };
165
166 static struct platform_device omap16xx_gpio3 = {
167         .name           = "omap_gpio",
168         .id             = 3,
169         .dev            = {
170                 .platform_data = &omap16xx_gpio3_config,
171         },
172         .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
173         .resource = omap16xx_gpio3_resources,
174 };
175
176 /* gpio4 */
177 static struct resource omap16xx_gpio4_resources[] = {
178         {
179                 .start  = OMAP1610_GPIO4_BASE,
180                 .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
181                 .flags  = IORESOURCE_MEM,
182         },
183         {
184                 .start  = INT_1610_GPIO_BANK4,
185                 .flags  = IORESOURCE_IRQ,
186         },
187 };
188
189 static struct omap_gpio_platform_data omap16xx_gpio4_config = {
190         .bank_width             = 16,
191         .regs                   = &omap16xx_gpio_regs,
192 };
193
194 static struct platform_device omap16xx_gpio4 = {
195         .name           = "omap_gpio",
196         .id             = 4,
197         .dev            = {
198                 .platform_data = &omap16xx_gpio4_config,
199         },
200         .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
201         .resource = omap16xx_gpio4_resources,
202 };
203
204 static struct platform_device *omap16xx_gpio_dev[] __initdata = {
205         &omap16xx_mpu_gpio,
206         &omap16xx_gpio1,
207         &omap16xx_gpio2,
208         &omap16xx_gpio3,
209         &omap16xx_gpio4,
210 };
211
212 /*
213  * omap16xx_gpio_init needs to be done before
214  * machine_init functions access gpio APIs.
215  * Hence omap16xx_gpio_init is a postcore_initcall.
216  */
217 static int __init omap16xx_gpio_init(void)
218 {
219         int i;
220         void __iomem *base;
221         struct resource *res;
222         struct platform_device *pdev;
223         struct omap_gpio_platform_data *pdata;
224
225         if (!cpu_is_omap16xx())
226                 return -EINVAL;
227
228         /*
229          * Enable system clock for GPIO module.
230          * The CAM_CLK_CTRL *is* really the right place.
231          */
232         omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
233                                         ULPD_CAM_CLK_CTRL);
234
235         for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
236                 pdev = omap16xx_gpio_dev[i];
237                 pdata = pdev->dev.platform_data;
238
239                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
240                 if (unlikely(!res)) {
241                         dev_err(&pdev->dev, "Invalid mem resource.\n");
242                         return -ENODEV;
243                 }
244
245                 base = ioremap(res->start, resource_size(res));
246                 if (unlikely(!base)) {
247                         dev_err(&pdev->dev, "ioremap failed.\n");
248                         return -ENOMEM;
249                 }
250
251                 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
252                 iounmap(base);
253
254                 platform_device_register(omap16xx_gpio_dev[i]);
255         }
256
257         return 0;
258 }
259 postcore_initcall(omap16xx_gpio_init);