1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * OMAP16xx specific gpio init
4 *
5 * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com/
6 *
7 * Author:
8 * Charulatha V <charu@ti.com>
9 */
10
11 #include <linux/platform_data/gpio-omap.h>
12 #include <linux/soc/ti/omap1-io.h>
13
14 #include "hardware.h"
15 #include "irqs.h"
16 #include "soc.h"
17
18 #define OMAP1610_GPIO1_BASE 0xfffbe400
19 #define OMAP1610_GPIO2_BASE 0xfffbec00
20 #define OMAP1610_GPIO3_BASE 0xfffbb400
21 #define OMAP1610_GPIO4_BASE 0xfffbbc00
22 #define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE
23
24 /* smart idle, enable wakeup */
25 #define SYSCONFIG_WORD 0x14
26
27 /* mpu gpio */
28 static struct resource omap16xx_mpu_gpio_resources[] = {
29 {
30 .start = OMAP1_MPUIO_VBASE,
31 .end = OMAP1_MPUIO_VBASE + SZ_2K - 1,
32 .flags = IORESOURCE_MEM,
33 },
34 {
35 .start = INT_MPUIO,
36 .flags = IORESOURCE_IRQ,
37 },
38 };
39
40 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
41 .revision = USHRT_MAX,
42 .direction = OMAP_MPUIO_IO_CNTL,
43 .datain = OMAP_MPUIO_INPUT_LATCH,
44 .dataout = OMAP_MPUIO_OUTPUT,
45 .irqstatus = OMAP_MPUIO_GPIO_INT,
46 .irqenable = OMAP_MPUIO_GPIO_MASKIT,
47 .irqenable_inv = true,
48 .irqctrl = OMAP_MPUIO_GPIO_INT_EDGE,
49 };
50
51 static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = {
52 .is_mpuio = true,
53 .bank_width = 16,
54 .bank_stride = 1,
55 .regs = &omap16xx_mpuio_regs,
56 };
57
58 static struct platform_device omap16xx_mpu_gpio = {
59 .name = "omap_gpio",
60 .id = 0,
61 .dev = {
62 .platform_data = &omap16xx_mpu_gpio_config,
63 },
64 .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
65 .resource = omap16xx_mpu_gpio_resources,
66 };
67
68 /* gpio1 */
69 static struct resource omap16xx_gpio1_resources[] = {
70 {
71 .start = OMAP1610_GPIO1_BASE,
72 .end = OMAP1610_GPIO1_BASE + SZ_2K - 1,
73 .flags = IORESOURCE_MEM,
74 },
75 {
76 .start = INT_GPIO_BANK1,
77 .flags = IORESOURCE_IRQ,
78 },
79 };
80
81 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
82 .revision = OMAP1610_GPIO_REVISION,
83 .direction = OMAP1610_GPIO_DIRECTION,
84 .set_dataout = OMAP1610_GPIO_SET_DATAOUT,
85 .clr_dataout = OMAP1610_GPIO_CLEAR_DATAOUT,
86 .datain = OMAP1610_GPIO_DATAIN,
87 .dataout = OMAP1610_GPIO_DATAOUT,
88 .irqstatus = OMAP1610_GPIO_IRQSTATUS1,
89 .irqenable = OMAP1610_GPIO_IRQENABLE1,
90 .set_irqenable = OMAP1610_GPIO_SET_IRQENABLE1,
91 .clr_irqenable = OMAP1610_GPIO_CLEAR_IRQENABLE1,
92 .wkup_en = OMAP1610_GPIO_WAKEUPENABLE,
93 .edgectrl1 = OMAP1610_GPIO_EDGE_CTRL1,
94 .edgectrl2 = OMAP1610_GPIO_EDGE_CTRL2,
95 };
96
97 static struct omap_gpio_platform_data omap16xx_gpio1_config = {
98 .bank_width = 16,
99 .regs = &omap16xx_gpio_regs,
100 };
101
102 static struct platform_device omap16xx_gpio1 = {
103 .name = "omap_gpio",
104 .id = 1,
105 .dev = {
106 .platform_data = &omap16xx_gpio1_config,
107 },
108 .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
109 .resource = omap16xx_gpio1_resources,
110 };
111
112 /* gpio2 */
113 static struct resource omap16xx_gpio2_resources[] = {
114 {
115 .start = OMAP1610_GPIO2_BASE,
116 .end = OMAP1610_GPIO2_BASE + SZ_2K - 1,
117 .flags = IORESOURCE_MEM,
118 },
119 {
120 .start = INT_1610_GPIO_BANK2,
121 .flags = IORESOURCE_IRQ,
122 },
123 };
124
125 static struct omap_gpio_platform_data omap16xx_gpio2_config = {
126 .bank_width = 16,
127 .regs = &omap16xx_gpio_regs,
128 };
129
130 static struct platform_device omap16xx_gpio2 = {
131 .name = "omap_gpio",
132 .id = 2,
133 .dev = {
134 .platform_data = &omap16xx_gpio2_config,
135 },
136 .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
137 .resource = omap16xx_gpio2_resources,
138 };
139
140 /* gpio3 */
141 static struct resource omap16xx_gpio3_resources[] = {
142 {
143 .start = OMAP1610_GPIO3_BASE,
144 .end = OMAP1610_GPIO3_BASE + SZ_2K - 1,
145 .flags = IORESOURCE_MEM,
146 },
147 {
148 .start = INT_1610_GPIO_BANK3,
149 .flags = IORESOURCE_IRQ,
150 },
151 };
152
153 static struct omap_gpio_platform_data omap16xx_gpio3_config = {
154 .bank_width = 16,
155 .regs = &omap16xx_gpio_regs,
156 };
157
158 static struct platform_device omap16xx_gpio3 = {
159 .name = "omap_gpio",
160 .id = 3,
161 .dev = {
162 .platform_data = &omap16xx_gpio3_config,
163 },
164 .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
165 .resource = omap16xx_gpio3_resources,
166 };
167
168 /* gpio4 */
169 static struct resource omap16xx_gpio4_resources[] = {
170 {
171 .start = OMAP1610_GPIO4_BASE,
172 .end = OMAP1610_GPIO4_BASE + SZ_2K - 1,
173 .flags = IORESOURCE_MEM,
174 },
175 {
176 .start = INT_1610_GPIO_BANK4,
177 .flags = IORESOURCE_IRQ,
178 },
179 };
180
181 static struct omap_gpio_platform_data omap16xx_gpio4_config = {
182 .bank_width = 16,
183 .regs = &omap16xx_gpio_regs,
184 };
185
186 static struct platform_device omap16xx_gpio4 = {
187 .name = "omap_gpio",
188 .id = 4,
189 .dev = {
190 .platform_data = &omap16xx_gpio4_config,
191 },
192 .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
193 .resource = omap16xx_gpio4_resources,
194 };
195
196 static struct platform_device *omap16xx_gpio_dev[] __initdata = {
197 &omap16xx_mpu_gpio,
198 &omap16xx_gpio1,
199 &omap16xx_gpio2,
200 &omap16xx_gpio3,
201 &omap16xx_gpio4,
202 };
203
204 /*
205 * omap16xx_gpio_init needs to be done before
206 * machine_init functions access gpio APIs.
207 * Hence omap16xx_gpio_init is a postcore_initcall.
208 */
209 static int __init omap16xx_gpio_init(void)
210 {
211 int i;
212 void __iomem *base;
213 struct resource *res;
214 struct platform_device *pdev;
215 struct omap_gpio_platform_data *pdata;
216
217 if (!cpu_is_omap16xx())
218 return -EINVAL;
219
220 /*
221 * Enable system clock for GPIO module.
222 * The CAM_CLK_CTRL *is* really the right place.
223 */
224 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
225 ULPD_CAM_CLK_CTRL);
226
227 for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
228 pdev = omap16xx_gpio_dev[i];
229 pdata = pdev->dev.platform_data;
230
231 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
232 if (unlikely(!res)) {
233 dev_err(&pdev->dev, "Invalid mem resource.\n");
234 return -ENODEV;
235 }
236
237 base = ioremap(res->start, resource_size(res));
238 if (unlikely(!base)) {
239 dev_err(&pdev->dev, "ioremap failed.\n");
240 return -ENOMEM;
241 }
242
243 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
244 iounmap(base);
245
246 platform_device_register(omap16xx_gpio_dev[i]);
247 }
248
249 return 0;
250 }
251 postcore_initcall(omap16xx_gpio_init);
252
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.