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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-omap1/gpio16xx.c

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  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);
260 

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