1/*
2 * OMAP16xx specific gpio init
3 *
4 * Copyright (C) 2010 Texas Instruments Incorporated - https://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 */
36static 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
48static 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
59static 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
66static 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 */
77static 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
89static 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
105static struct omap_gpio_platform_data omap16xx_gpio1_config = {
106	.bank_width		= 16,
107	.regs                   = &omap16xx_gpio_regs,
108};
109
110static 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 */
121static 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
133static struct omap_gpio_platform_data omap16xx_gpio2_config = {
134	.bank_width		= 16,
135	.regs                   = &omap16xx_gpio_regs,
136};
137
138static 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 */
149static 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
161static struct omap_gpio_platform_data omap16xx_gpio3_config = {
162	.bank_width		= 16,
163	.regs                   = &omap16xx_gpio_regs,
164};
165
166static 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 */
177static 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
189static struct omap_gpio_platform_data omap16xx_gpio4_config = {
190	.bank_width		= 16,
191	.regs                   = &omap16xx_gpio_regs,
192};
193
194static 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
204static 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 */
217static 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}
259postcore_initcall(omap16xx_gpio_init);
260